Depending on how high or low you aim, you'll probably eventually bump up against DeMorgan and related logic rules, and Venn diagrams. Dependencies, things of that nature. Also you need enough glossary knowledge or whatever to at least be able to talk to the programmers about "big O notation" and how you'll scale designs accordingly. To some extent its easier to learn how crypto works, than to try an memorize every little obscure detail of every implementation, so some number theory seems appropriate.
Now why the industry has decided that a programmer with a university degree is better than one with a degree from a decent vocational school, I have no idea..
My AS in electronics which was pretty much a EE without the liberal arts electives was around $1500/semester full time depending on books.
My BS in CS at a private college was around $15000/semester full time (although I went part time with reimbursement, even with xfer credits from the associates took something like 6 years)
That's $13500 per semester of debt slavery. Or $13500 willingness to be lead around by a nose ring without regard to the students future. Or willingness to follow the herd.
If a voc/tech school charged as much as a engineering university, then it would get the same respect. Its just conspicuous consumption, nothing more.
The high school reunion industrial complex, as one of the few remaining vibrant industries in America, so its been declared "too big to fail" so we can't get rid of H.S.
Interestingly the reunion industrial complex is failing due to facebook... Why do you need a retro-cover-band and a rented hall to find out whats new, when every one who cares about such things, already knows from facebook.
My learning almost completely stopped in H.S.... its curriculum moves too slow. Made a very painful impact when I suddenly had to start learning again at university. Whoa, I haven't studied since middle school, WTF? You mean I have to read the book now?
GodGell (897123) made a pretty convincing display of how mathematics has to be taught (classes mostly suck, books mostly suck, online mostly sucks, turns out there is no royal road to geometry even after centuries...) but we don't really "need" language classes because immersion works well enough for everyone but the grammar fascists. Therefore I think "we" need algebra class a lot more than "we" need english lit.
Linkedin is for jobs and networking, there is no need for it to be 'cool'.
Yeah, that's their problem. I am a linkedin "user" but I blocked all their spam and haven't logged in for years. Why would I? Going to be a struggle to monetize this "data".
I kept my account for about three months, mostly to see if I could find a couple old girlfriends
There's only two kinds of middle aged straight men, those who admit they looked up high school female classmates who wouldn't date them, found out they're "out" lesbians, slap the desk and say damnit I knew it all along, and the other kind of middle aged straight man, who in comparison lies and claims he didn't do the search.
"I knew it! I knew it! That explains a whole hell of a lot!"
My mom is on Facebook, although I am not. I saw a story a few years ago about how this sudden increase in older people was hurting Facebook's cool factor and driving some of the younger people away.
Any/.ers with a kid / parent also/.ers? Why can't we have interesting ask/.s like that? Tech seems to run in families, or so claims this 4th generation engineer / 3rd generation ham radio operator...
GP is confused WRT "perpendicular society". Facebook and society are pretty orthogonal. Most FB users I know have about 5% "friends" in a parallel life stream (mostly family relatives, the closest of friends etc) and 95% "friends" who's life went radically, irrelevantly perpendicular to the users life, which is why they only consider socializing with those weirdos via a website. When I fooled around w/ facebook before deleting my account a couple years ago, most of the people I "friended" had an approximately zero inner/dot product of our live's paths.
That's probably way too much linear algebra humor for/. on a sunday afternoon.
Lastly, why couldn't they build a huge engine and de rate it to obtain reliability?
ppanon's answer is mostly correct, but the main problem is the relationship between reliability and performance is strongly non-linear. Dropping performance by 50% might only increase safety by 0.1%.
Very crude example using made up numbers is you drop turbopump RPMs by half and run the mixture ridiculously rich so it looks like a candle flame and drop chamber pressure to half what it was. On one side you just zapped maybe 90% of performance, easily meeting that goal. The problem is the turbopump is only about 0.001% more reliable because its still spinning at 50K RPM, the lower chamber pressure and impaired mixture means lower combustion temp means its only dull red instead of bright red, etc.
A crude/. car analogy is flooring an engine and dyno testing it is pretty hard on the engine, even if you intentionally detune the engine a bit. It fact if you detune it to the point of backfiring and pinging its much worse for it.
Another issue that no one likes to discuss is the chamber and nozzle acoustic model is designed for a certain set of conditions and flow rate. You kinda have to start over again if you derate. You can run over a wide range if you're willing to trade efficiency, but... You don't want to crank down the injection pressure, resulting in a lower delta p across the injectors, resulting in a screamer or chugger blowing the thing to pieces.
Then another thing is your exhaust "bell" part of the nozzle is designed for a certain flow rate delta p and exhaust pressure. Drop the pressure enough and you can supposedly get the nozzle to collapse in on itself. Also where the flow separates inside the nozzle has pretty serious thermal and mechanical problems.
So you need a new set of acoustic tests and probably chamber fixes, and a new injector design, and a new nozzle, probably new turbopumps... So you get to keep... I donno... the chamber and mounting arms I guess. It seems a lot faster simpler and cheaper if you have a 100 Kpound thrust engine and you need a 10 Kpound thrust engine to simply sell the 100K for whatever you can get and buy an off the shelf 10K design.
Must be a chick, that's the only logical reason anyone would ever look at a manual.
Ever.
My chick did not come with a manual, which would have helped during initial set up and especially during troubleshooting. Seems to malfunction every month. No, she's not a realdoll or even a Korean graymarket purchased off ebay.
its only very slightly better in terms of greenhouse gas emissions for the energy produced, and even completely replacing all coal power generation overnight wouldn't do much for climate change. In the context of climate change, natural gas is red herring, not an alternative.
To inject a little science and engineering into it beyond DragonWriter says so, you can't transport natgas by shoveling chunks of it into a barge, and you can't store it by merely creating a pile of it out in the open. Yes it takes more energy to dig coal out of the ground than natgas, but it turns out to be pretty cheap compared to the transport and storage energy costs. The mine vs well thing is pretty much a non-starter WRT to EROEI ratios.
The real tragedy of burning natgas as a primary energy source is its so freaking useful in the chemical industry for fertilizer and plastics and who knows what else. Its kind of like burning fine art paintings to keep warm, what a waste. Someday some poor bastard is going to be gassifying coal to make synthetic natgas to make fertilizer so he can eat while damning us for "wasting" the natgas by burning it.
Short version is natgas is insane expensive to transport and store and is "more valuable" in the long run as a feedstock than as a fuel.
OK I'll rephrase to "given two uniformed combatants, the nicer looking uniform always loses unless Wellington is commanding or unless dkleinsc can think of one more example in the history of warfare." I agree the French were kind of stylish so it is a matter of taste which we can disagree on. I believe there is a TV show on Style or HGTV which could authoritatively answer which uniform was more fabulous.
More likely is that the fanciness of uniforms have pretty much no effect on military effectiveness, and that wins and losses were due to unrelated factors.
Oh I donno takes a lot of hubris to dump money into silk and gold braid and bright dyes and feathers in an intimidation attempt instead of dumping the money into sharp steel and high speed lead delivery. Dump training time into spit and polish and parade ground instead of weapons training never turned out well. Sending the ceremonial guard in "impress the non-military" uniform up against frontline troops historically has always turned out poorly. Bright red coats carrying rifles intimidated the native americans, but merely helped the rebelious colonists aim.
Arguably uniforms vs no uniforms isn't even fair, thats usually.mil vs civilians, and usually that doesn't turn out very well for the civilians, unless the americans are involved, in which case the civilians always win (colonial new england, the VC, afghanistan, iraq, etc) with the correction factor of all the "good" civil war era generals were southerners so no uniform certainly did not equal civilians in that case.
Could argue the finest of details for awhile, but historically you look at the uniform on both sides, the cooler/nicer/better/more fabulous uniform is the side that lost.
LOL not relevant. More than secure enough for this problem. I really only use the last 16 bits or so.. Hmm the file on cluster03 has the last hex digits 1a just like the old version of the file as opposed to the new file which should end in d9... wtf
All you need is to do simultaneously to break my protocol and insert your key into my authorized_keys file as a MITM is: 1) Calculate a rsa pub and priv key (OK no problemo so far) 2) With the minor little criteria that your pub key, after being concatenated or inserted into the keys file and run thru mcrypt (oh wait, you need my mcrypt passphrase too) when pushed thru md5sum hashes to the same value so I don't notice you added it. Well I only look at the last 8 to 16 bits or so visually so... 3) Also wc -l.ssh/authorized_keys would look weird and your MITM attack file would have an unusual length, aside from all the crypto. Yes you don't notice going from 58 lines to 59, but you tend to notice going from 1 line to 2 lines.
Merely saying "md5 isn't secure because it was broken and now only offers 90 bits of security in a given plaintext attack" is a huge leap away from "my system is insecure".
Basically I'm testing file integrity two ways, does it md5 to the same value on both boxes in other words I gave them the correct mcrypted file and does it mcrypt decrypt properly given the verbally provided passphrase in which case its probably not been messed with. Or rephrased its not enough to break md5 or one of the mcrypt protocols, you have to utterly break them both with chosen plaintext attacks.
I could just GPG sign the thing and verify my sigs there and the GPG fingerprint for the signing key matches, if trusted data connectivity were already up, but this is a long story as to why not mostly involving transfer of the mcrypt key being verbal and I'm not about to uuencode my GPG pub key and read it over the phone so they have a copy to verify the sig etc etc. Why? Once you have SSH keys you can ghettovpn via tunneling to set up openvpn to etc etc... So its not a good general solution to secure file transmission, but is an interesting bootstrapping proposal.
Bootstrapping crypto trust is an interesting problem if you start it by voice and don't rely on a trusted 3rd party.
We still cannot prove that any of these particular methods for cryptography today couldn't be completely broken wide open with a numerical discovery tomorrow
I think there's some pretty impressive proofs that prove breaking factoring would have some pretty wild implications across mathematics. You could keep it secret for awhile, but math advances have a way of sneaking out and being detected in applied sciences. Maybe rephrased it would be hard to break all of modern crypto without making life extremely exciting for most mathematicians, not just cypherpunks.
For a good, kind of sci-fi far out laugh, maybe not realistic, but would be cool if it worked out that way, look at some combinatorial/bit stream physics (which I acknowledge is not entirely mainstream popular in physics). What if broken factoring means the sun collapses into a black hole due to that physics theory, just like 2+2=5 would imply all kinds of whacked out gravitational effects if it were true. It is possible if something provable in a bit stream physics theory had some interesting and measurable quantum effect that depends inherently on factoring not being broken, then you could perform a physics experiment to prove factoring is not broken. But before you get overly excited, this line of reasoning is more than a little sci fi ish. If you hate the idea of bit-stream physics thats OK, substitute in another physics theory where factoring could be an operator. But you insisted its somehow not provable that crypto is unbreakable, and at least in theory there exists a whacked out roadmap to prove factoring is not broken that could be verified by a physics experiment so I felt the need...
Technically incorrect. You don't have to meet in person to transfer individual id_rsa.pub files to be inserted into the.ssh/authorized_keys file, you just have to find a secure way to share a symmetric encryption key with someone and then transfer the mcrypt'd key data at your leisure. In english this more or less describes how a certain script of mine transfers my authorized_keys file around to various machines, there's also a md5 hash to see if the data has been messed with or corrupted, etc.
Also meeting in person, perhaps to examine each other's govt issued identity docs, is only really useful if you're better at detecting fake/falsified identity documents than the opposition is at creating or obtaining them. The opposition theoretically has much more impressive resources than you'll ever have.
Most people just want to encrypt the traffic between themselves and www.$x.com, and that the server that claims to be www.$x.com is the same one in DNS. I could really care less that www.$x.com is actually the company residing at a verified address, with letterhead, etc.
Well, somebody's outed as not being able to answer "What a man in the middle attack?"
Good analogy but you're missing the wallet/pocket analogy which is much better.
My wallet is easy to grab out of my pocket, but you have to invade my personal space to do it, so its incredibly inconvenient and each attempt is painfully obvious to me and only a few people in the world at any given instant, all of whom must be hyper-local and in my legal jurisdiction, can stick their hand in my pocket to fish around for my wallet, at any given time. Sure, a Russian gangster can get my wallet... but he has to travel to me first.
This is the best analogy to the internet, in fact the core technology is oriented purposefully around preventing a situation like this. Sometimes the most obvious solution is hardest to see... a "wallet" and/or "pocket" concept just doesn't work on the internet. Simple, huh?
Its not the techie's problem to find a way to install horse's reins on a starship helm control board.
Good engineers are hard to come by. Good mathematicians, physicists are rare.
My advice is is someone says you sound kool-aid drinky the most effective response is likely not to repeat yourself and quote some made up for political motivation.gov stats. Do what you want, do what works for you, do it well, it just doesn't work for me. And that's OK, as long as we're having fun. But you're not convincing me.
Good chefs, artists, musicians, landscapers, textile workers, poets, and tool and die makers are equally rare. Yet very poorly paid. There is no magic connection where having skills or working hard automagically results in high income, or knowing calculus automagically results in high income. If anything there's a slight inverse relationship between skill/ability/education and income aside from the outliers.
But hey, we must hope or despair.
Or do something else. STEM is not rewarded, in fact strongly punished, by the market? Do something else at work. Something non-STEM.
If you like STEM, make it a hobby. You don't have to work doing what you like to do. If that was the case my grandmother would have been doomed to suffer in a Vietnamese clothing sweatshop. Instead she was a pretty decent typist in Milwaukee during the day, and knitted sweaters for her grandkids in the evening. This strategy doesn't work well if you really like organometallic chemistry experimentation or nuclear engineering, but it works for most, and is better than starvation.
So there is in reality almost no unemployment for people with higher education degrees.
LOL I'll let my math major buddy who was downsized from her low level customer service job know she doesn't exist! This individual anecdote times (literally) about five to ten million unemployed people. Oh and I'll tell my bachelors degree in education waitress buddy when I leave her a nice tip. And my wife's buddy who has a masters in special ed who's unemployed. Come to think of it, because its a "social circle thing" virtually everyone I know who's unemployed pretty much by definition has a "higher education degree". All a new "higher education degree" gets you is a lower net worth and higher expenses due to the loans. If you're going to be unemployed anyway, or only work at starbucks or customer service anyway, getting in debt first isn't going to help.
If Amazon ever gets a real selection for prime streaming I will switch to that.
Can you now buy prime streaming alone, or only the package deal with free shipping for "stuff" and kindle books? I have the package deal, don't know if there's a new cheaper option to just buy streaming. My kids don't care about selection, as long as there's a purple dinosaur on screen they're happy.
BTW "Real selection" comes from U****t or torrents and is viewed on the mythtv box connected to the adjacent HDMI connector with a multi-terabyte array on the other side, coincidentally that's the same place live TV comes from. Mythtv used to have a awesome internet streaming module around 0.21 or 2006 or so... um not anymore. Ditto mythtv's music player which has turned into an incomprehensible spouse and kids defying playlist monstrosity, but soma fm works fine on the roku. You could say the next version of 0.25's music player is called roku.
OK I got the roku box. So, honey, I can sign up for amazon prime or netflix. If I sign up for amazon prime I'll never pay for postage again and it'll all be 2 day instead of next week or so, but netflix offers nothin extra. You can guess how that discussion turned out.
The crazy thing is amazon prime is basically free for me because I buy so much stuff from them that I profit WRT to annual fee vs no more postage. I assume this free postage stuff will go away if I buy too many 40 pound bags of kitty litter from the other side of the country. I have to look into that. I'll need road salt in a couple more months and I was thinking ten 80 pound bags of crystal solar salt might work.
Given how friendly fire,...appears to be such huge risks
"Targets in sight. Size 6 soldiers, activity low crawling toward our fighting position, can't ID uniform, in no mans zone, can't ID unit, time is now, looks like standard infantry equipment. Log it for intel. Assumed enemy combatants."
"Logged. Targets acquired. Requesting permission to fire mortars under ROE?"
"Deny Deny Deny their 60 gunner just stood up and she's wearing a chainmail bikini"
Slashdot Mirror
writes Klotz. "However, in the process, it foreclosed one possible avenue for gaining greater insight into China's intentions with respect to space."
Luckily that avenue is risky and useless. Isn't a very early step in the decision making process "exclude the really bad ideas"?
I aim to go into system administration
Depending on how high or low you aim, you'll probably eventually bump up against DeMorgan and related logic rules, and Venn diagrams. Dependencies, things of that nature. Also you need enough glossary knowledge or whatever to at least be able to talk to the programmers about "big O notation" and how you'll scale designs accordingly. To some extent its easier to learn how crypto works, than to try an memorize every little obscure detail of every implementation, so some number theory seems appropriate.
Now why the industry has decided that a programmer with a university degree is better than one with a degree from a decent vocational school, I have no idea..
My AS in electronics which was pretty much a EE without the liberal arts electives was around $1500/semester full time depending on books.
My BS in CS at a private college was around $15000/semester full time (although I went part time with reimbursement, even with xfer credits from the associates took something like 6 years)
That's $13500 per semester of debt slavery. Or $13500 willingness to be lead around by a nose ring without regard to the students future. Or willingness to follow the herd.
If a voc/tech school charged as much as a engineering university, then it would get the same respect. Its just conspicuous consumption, nothing more.
... is High School necessary?
The high school reunion industrial complex, as one of the few remaining vibrant industries in America, so its been declared "too big to fail" so we can't get rid of H.S.
Interestingly the reunion industrial complex is failing due to facebook... Why do you need a retro-cover-band and a rented hall to find out whats new, when every one who cares about such things, already knows from facebook.
My learning almost completely stopped in H.S.... its curriculum moves too slow. Made a very painful impact when I suddenly had to start learning again at university. Whoa, I haven't studied since middle school, WTF? You mean I have to read the book now?
GodGell (897123) made a pretty convincing display of how mathematics has to be taught (classes mostly suck, books mostly suck, online mostly sucks, turns out there is no royal road to geometry even after centuries...) but we don't really "need" language classes because immersion works well enough for everyone but the grammar fascists. Therefore I think "we" need algebra class a lot more than "we" need english lit.
Linkedin is for jobs and networking, there is no need for it to be 'cool'.
Yeah, that's their problem. I am a linkedin "user" but I blocked all their spam and haven't logged in for years. Why would I? Going to be a struggle to monetize this "data".
I kept my account for about three months, mostly to see if I could find a couple old girlfriends
There's only two kinds of middle aged straight men, those who admit they looked up high school female classmates who wouldn't date them, found out they're "out" lesbians, slap the desk and say damnit I knew it all along, and the other kind of middle aged straight man, who in comparison lies and claims he didn't do the search.
"I knew it! I knew it! That explains a whole hell of a lot!"
My mom is on Facebook, although I am not. I saw a story a few years ago about how this sudden increase in older people was hurting Facebook's cool factor and driving some of the younger people away.
Any /.ers with a kid / parent also /.ers? Why can't we have interesting ask /.s like that? Tech seems to run in families, or so claims this 4th generation engineer / 3rd generation ham radio operator...
Normal society. Where does that exist?
Do we really have to point you to a dictionary?
GP is confused WRT "perpendicular society". Facebook and society are pretty orthogonal. Most FB users I know have about 5% "friends" in a parallel life stream (mostly family relatives, the closest of friends etc) and 95% "friends" who's life went radically, irrelevantly perpendicular to the users life, which is why they only consider socializing with those weirdos via a website. When I fooled around w/ facebook before deleting my account a couple years ago, most of the people I "friended" had an approximately zero inner/dot product of our live's paths.
That's probably way too much linear algebra humor for /. on a sunday afternoon.
Lastly, why couldn't they build a huge engine and de rate it to obtain reliability?
ppanon's answer is mostly correct, but the main problem is the relationship between reliability and performance is strongly non-linear. Dropping performance by 50% might only increase safety by 0.1%.
Very crude example using made up numbers is you drop turbopump RPMs by half and run the mixture ridiculously rich so it looks like a candle flame and drop chamber pressure to half what it was. On one side you just zapped maybe 90% of performance, easily meeting that goal. The problem is the turbopump is only about 0.001% more reliable because its still spinning at 50K RPM, the lower chamber pressure and impaired mixture means lower combustion temp means its only dull red instead of bright red, etc.
A crude /. car analogy is flooring an engine and dyno testing it is pretty hard on the engine, even if you intentionally detune the engine a bit. It fact if you detune it to the point of backfiring and pinging its much worse for it.
Another issue that no one likes to discuss is the chamber and nozzle acoustic model is designed for a certain set of conditions and flow rate. You kinda have to start over again if you derate. You can run over a wide range if you're willing to trade efficiency, but... You don't want to crank down the injection pressure, resulting in a lower delta p across the injectors, resulting in a screamer or chugger blowing the thing to pieces.
Then another thing is your exhaust "bell" part of the nozzle is designed for a certain flow rate delta p and exhaust pressure. Drop the pressure enough and you can supposedly get the nozzle to collapse in on itself. Also where the flow separates inside the nozzle has pretty serious thermal and mechanical problems.
So you need a new set of acoustic tests and probably chamber fixes, and a new injector design, and a new nozzle, probably new turbopumps... So you get to keep ... I donno ... the chamber and mounting arms I guess. It seems a lot faster simpler and cheaper if you have a 100 Kpound thrust engine and you need a 10 Kpound thrust engine to simply sell the 100K for whatever you can get and buy an off the shelf 10K design.
Must be a chick, that's the only logical reason anyone would ever look at a manual.
Ever.
My chick did not come with a manual, which would have helped during initial set up and especially during troubleshooting. Seems to malfunction every month. No, she's not a realdoll or even a Korean graymarket purchased off ebay.
its only very slightly better in terms of greenhouse gas emissions for the energy produced, and even completely replacing all coal power generation overnight wouldn't do much for climate change. In the context of climate change, natural gas is red herring, not an alternative.
To inject a little science and engineering into it beyond DragonWriter says so, you can't transport natgas by shoveling chunks of it into a barge, and you can't store it by merely creating a pile of it out in the open. Yes it takes more energy to dig coal out of the ground than natgas, but it turns out to be pretty cheap compared to the transport and storage energy costs. The mine vs well thing is pretty much a non-starter WRT to EROEI ratios.
The real tragedy of burning natgas as a primary energy source is its so freaking useful in the chemical industry for fertilizer and plastics and who knows what else. Its kind of like burning fine art paintings to keep warm, what a waste. Someday some poor bastard is going to be gassifying coal to make synthetic natgas to make fertilizer so he can eat while damning us for "wasting" the natgas by burning it.
Short version is natgas is insane expensive to transport and store and is "more valuable" in the long run as a feedstock than as a fuel.
So the rules don't apply until we figure it out?
I'm not even sure what that means in context.
Are you religious?
LOL. Yeah, that's me, the prophet of /. Would you like to worship me?
OK I'll rephrase to "given two uniformed combatants, the nicer looking uniform always loses unless Wellington is commanding or unless dkleinsc can think of one more example in the history of warfare." I agree the French were kind of stylish so it is a matter of taste which we can disagree on. I believe there is a TV show on Style or HGTV which could authoritatively answer which uniform was more fabulous.
More likely is that the fanciness of uniforms have pretty much no effect on military effectiveness, and that wins and losses were due to unrelated factors.
Oh I donno takes a lot of hubris to dump money into silk and gold braid and bright dyes and feathers in an intimidation attempt instead of dumping the money into sharp steel and high speed lead delivery. Dump training time into spit and polish and parade ground instead of weapons training never turned out well. Sending the ceremonial guard in "impress the non-military" uniform up against frontline troops historically has always turned out poorly. Bright red coats carrying rifles intimidated the native americans, but merely helped the rebelious colonists aim.
Arguably uniforms vs no uniforms isn't even fair, thats usually .mil vs civilians, and usually that doesn't turn out very well for the civilians, unless the americans are involved, in which case the civilians always win (colonial new england, the VC, afghanistan, iraq, etc) with the correction factor of all the "good" civil war era generals were southerners so no uniform certainly did not equal civilians in that case.
Could argue the finest of details for awhile, but historically you look at the uniform on both sides, the cooler/nicer/better/more fabulous uniform is the side that lost.
How secure is your md5 hash?
LOL not relevant. More than secure enough for this problem. I really only use the last 16 bits or so.. Hmm the file on cluster03 has the last hex digits 1a just like the old version of the file as opposed to the new file which should end in d9... wtf
All you need is to do simultaneously to break my protocol and insert your key into my authorized_keys file as a MITM is: .ssh/authorized_keys would look weird and your MITM attack file would have an unusual length, aside from all the crypto. Yes you don't notice going from 58 lines to 59, but you tend to notice going from 1 line to 2 lines.
1) Calculate a rsa pub and priv key (OK no problemo so far)
2) With the minor little criteria that your pub key, after being concatenated or inserted into the keys file and run thru mcrypt (oh wait, you need my mcrypt passphrase too) when pushed thru md5sum hashes to the same value so I don't notice you added it. Well I only look at the last 8 to 16 bits or so visually so...
3) Also wc -l
Merely saying "md5 isn't secure because it was broken and now only offers 90 bits of security in a given plaintext attack" is a huge leap away from "my system is insecure".
Basically I'm testing file integrity two ways, does it md5 to the same value on both boxes in other words I gave them the correct mcrypted file and does it mcrypt decrypt properly given the verbally provided passphrase in which case its probably not been messed with. Or rephrased its not enough to break md5 or one of the mcrypt protocols, you have to utterly break them both with chosen plaintext attacks.
I could just GPG sign the thing and verify my sigs there and the GPG fingerprint for the signing key matches, if trusted data connectivity were already up, but this is a long story as to why not mostly involving transfer of the mcrypt key being verbal and I'm not about to uuencode my GPG pub key and read it over the phone so they have a copy to verify the sig etc etc. Why? Once you have SSH keys you can ghettovpn via tunneling to set up openvpn to etc etc... So its not a good general solution to secure file transmission, but is an interesting bootstrapping proposal.
Bootstrapping crypto trust is an interesting problem if you start it by voice and don't rely on a trusted 3rd party.
My guess? It's there is a huge chuck of electricity lost.
Run the numbers and compare to a space heater. If its much above single digits loss you'll melt the car. Its really quite a bit of power.
We still cannot prove that any of these particular methods for cryptography today couldn't be completely broken wide open with a numerical discovery tomorrow
I think there's some pretty impressive proofs that prove breaking factoring would have some pretty wild implications across mathematics. You could keep it secret for awhile, but math advances have a way of sneaking out and being detected in applied sciences. Maybe rephrased it would be hard to break all of modern crypto without making life extremely exciting for most mathematicians, not just cypherpunks.
For a good, kind of sci-fi far out laugh, maybe not realistic, but would be cool if it worked out that way, look at some combinatorial/bit stream physics (which I acknowledge is not entirely mainstream popular in physics). What if broken factoring means the sun collapses into a black hole due to that physics theory, just like 2+2=5 would imply all kinds of whacked out gravitational effects if it were true. It is possible if something provable in a bit stream physics theory had some interesting and measurable quantum effect that depends inherently on factoring not being broken, then you could perform a physics experiment to prove factoring is not broken. But before you get overly excited, this line of reasoning is more than a little sci fi ish. If you hate the idea of bit-stream physics thats OK, substitute in another physics theory where factoring could be an operator. But you insisted its somehow not provable that crypto is unbreakable, and at least in theory there exists a whacked out roadmap to prove factoring is not broken that could be verified by a physics experiment so I felt the need ...
Technically incorrect. You don't have to meet in person to transfer individual id_rsa.pub files to be inserted into the .ssh/authorized_keys file, you just have to find a secure way to share a symmetric encryption key with someone and then transfer the mcrypt'd key data at your leisure. In english this more or less describes how a certain script of mine transfers my authorized_keys file around to various machines, there's also a md5 hash to see if the data has been messed with or corrupted, etc.
Also meeting in person, perhaps to examine each other's govt issued identity docs, is only really useful if you're better at detecting fake/falsified identity documents than the opposition is at creating or obtaining them. The opposition theoretically has much more impressive resources than you'll ever have.
Most people just want to encrypt the traffic between themselves and www.$x.com, and that the server that claims to be www.$x.com is the same one in DNS. I could really care less that www.$x.com is actually the company residing at a verified address, with letterhead, etc.
Well, somebody's outed as not being able to answer "What a man in the middle attack?"
Good analogy but you're missing the wallet/pocket analogy which is much better.
My wallet is easy to grab out of my pocket, but you have to invade my personal space to do it, so its incredibly inconvenient and each attempt is painfully obvious to me and only a few people in the world at any given instant, all of whom must be hyper-local and in my legal jurisdiction, can stick their hand in my pocket to fish around for my wallet, at any given time. Sure, a Russian gangster can get my wallet... but he has to travel to me first.
This is the best analogy to the internet, in fact the core technology is oriented purposefully around preventing a situation like this. Sometimes the most obvious solution is hardest to see... a "wallet" and/or "pocket" concept just doesn't work on the internet. Simple, huh?
Its not the techie's problem to find a way to install horse's reins on a starship helm control board.
Good engineers are hard to come by. Good mathematicians, physicists are rare.
My advice is is someone says you sound kool-aid drinky the most effective response is likely not to repeat yourself and quote some made up for political motivation .gov stats. Do what you want, do what works for you, do it well, it just doesn't work for me. And that's OK, as long as we're having fun. But you're not convincing me.
Good chefs, artists, musicians, landscapers, textile workers, poets, and tool and die makers are equally rare. Yet very poorly paid. There is no magic connection where having skills or working hard automagically results in high income, or knowing calculus automagically results in high income. If anything there's a slight inverse relationship between skill/ability/education and income aside from the outliers.
But hey, we must hope or despair.
Or do something else. STEM is not rewarded, in fact strongly punished, by the market? Do something else at work. Something non-STEM.
If you like STEM, make it a hobby. You don't have to work doing what you like to do. If that was the case my grandmother would have been doomed to suffer in a Vietnamese clothing sweatshop. Instead she was a pretty decent typist in Milwaukee during the day, and knitted sweaters for her grandkids in the evening. This strategy doesn't work well if you really like organometallic chemistry experimentation or nuclear engineering, but it works for most, and is better than starvation.
So there is in reality almost no unemployment for people with higher education degrees.
LOL I'll let my math major buddy who was downsized from her low level customer service job know she doesn't exist! This individual anecdote times (literally) about five to ten million unemployed people. Oh and I'll tell my bachelors degree in education waitress buddy when I leave her a nice tip. And my wife's buddy who has a masters in special ed who's unemployed. Come to think of it, because its a "social circle thing" virtually everyone I know who's unemployed pretty much by definition has a "higher education degree". All a new "higher education degree" gets you is a lower net worth and higher expenses due to the loans. If you're going to be unemployed anyway, or only work at starbucks or customer service anyway, getting in debt first isn't going to help.
Well that was new (seriously) I had my first chrome crash.
No that's not it. The show I watched in the 00s was more urban, like amusement parks, or big cities like NYC, and not Canadian prairie.
Also I literally mean "Men in black" as in dudes in suits on foot, not guy on horse like the promo pics I saw on wikipedia.
If Amazon ever gets a real selection for prime streaming I will switch to that.
Can you now buy prime streaming alone, or only the package deal with free shipping for "stuff" and kindle books? I have the package deal, don't know if there's a new cheaper option to just buy streaming. My kids don't care about selection, as long as there's a purple dinosaur on screen they're happy.
BTW "Real selection" comes from U****t or torrents and is viewed on the mythtv box connected to the adjacent HDMI connector with a multi-terabyte array on the other side, coincidentally that's the same place live TV comes from. Mythtv used to have a awesome internet streaming module around 0.21 or 2006 or so... um not anymore. Ditto mythtv's music player which has turned into an incomprehensible spouse and kids defying playlist monstrosity, but soma fm works fine on the roku. You could say the next version of 0.25's music player is called roku.
wife acceptance factor?
OK I got the roku box. So, honey, I can sign up for amazon prime or netflix. If I sign up for amazon prime I'll never pay for postage again and it'll all be 2 day instead of next week or so, but netflix offers nothin extra. You can guess how that discussion turned out.
The crazy thing is amazon prime is basically free for me because I buy so much stuff from them that I profit WRT to annual fee vs no more postage. I assume this free postage stuff will go away if I buy too many 40 pound bags of kitty litter from the other side of the country. I have to look into that. I'll need road salt in a couple more months and I was thinking ten 80 pound bags of crystal solar salt might work.
Given how friendly fire, ...appears to be such huge risks
"Targets in sight. Size 6 soldiers, activity low crawling toward our fighting position, can't ID uniform, in no mans zone, can't ID unit, time is now, looks like standard infantry equipment. Log it for intel. Assumed enemy combatants."
"Logged. Targets acquired. Requesting permission to fire mortars under ROE?"
"Deny Deny Deny their 60 gunner just stood up and she's wearing a chainmail bikini"
Don't laugh it could happen