Engineers at Cisco Systems have known about this problem for a long time. Being in the field more often then at home, they came up with WRED, weighted random early drop. This method has enabled them to reduce buying toilet paper for their own home use to a very manageable small number of times a year. Clever.
Panic 12 as described in the article is most likely
a hardware fault somewhere on the mainboard. It is
by far the most common cause of a panic on FreeBSD.
Exchange mainboard, CPU and memory against working
components and you are back up and running without the panics.
Slightly adapted story from chinese literature,
and direct answer to all posts for this story:
Once upon a time an immigrant applied for a job at
Microsoft as a floor cleaner. The interview went
well and finally they went to arrange the details.
The interviewer told him: "Please write down your
e-mail address and we will send you the documents"
The immigrant replied: "I don't have a computer"
The interviewer gasped and said: "You don't have
any computer? Geee you can't work for us then we
are Microsoft!"
The immigrant went away and from his last three
bucks he bought tomatos and sold them. He did this
day after day, week after week, month after month
until he had earned enough to hire employees, buy
a storehouse, his business did go well.
Years later, he went to see a retirement advisor
to help invest his money wisely. The advisor came
up with a plan and finally said: "So give me your
e-mail address and I will send you the documents"
The immigrant replied: "I don't have a computer."
The advisor couldn't believe that and asked: "How
did you ever get that rich without a computer?"
To that he replied: "If I did have a computer,
I would be cleaning the floor at Microsoft now".
Actually you can play a little tempest on your
own using a recent PGP version with "tempest-safe"
fonts. Why? Your monitor emits radiation at a
range of frequencies and those most easily visible
are the higher ones because they carry a higher
energy (E=freq*h_const, physicist Max Planck
figured that one out around 1900).
So a font that is low-pass filtered eliminates
the high-frequency components in your monitor's
emissions and all the cheap guys see is a window
with nothing in it (your eyes are good enough of
course to still see the letters in light gray
over not-so-light gray).
Mind you this is not limited to CRTs because the
LCDs also use CRT controllers with high-MHz pixel
frequencies and are therefore also "visible".
Another source, should you be concerned, is your
keyboard, which most likely transmits AM signals
at a couple 100 kHz over not 100% shielded copper.
Today the FBI may bug your keyboard with a little
microcontroller, tomorrow they may make the tree
next to your room listen for long-wave AM radio.
Or if they really are after you they will listen
for data transmissions from your brand-new
Serial-ATA drive, using multi-million dollar
wireless equipment, while you save unencrypted
documents to your disk.
Did I scare you? No reason to be, because the
first countermeasure is always acknowledging
that there is a problem. One way surely is to
read John's excellent articles on cryptome.org
(do follow the links if you are curious).
You are fully correct but didn't I say just that?
I left out Gej and Max to cut my comments short,
but you are right there too, I even once wrote
them and asked them if they were good enough to
go from cracker to MPEG4 codec developers and
there was no reply.
The WMA audio vs. MP3 thing was just a sidenote.
First, there is only a 3ivx decoder which in fact
is a Quicktime 4 plugin. The de-facto standard
these days is a AVI-encoding enabled (i.e.patched)
version of Microsoft's MPEG4 V3 DirectShow filter
and that DS code alone is worth three months of
writing and debugging. But then, to make a codec
you need an encoder as well and this is also still
missing. But that is not the most difficult part.
Microsoft has spent a huge amount of work on
improvements for the original, specified MPEG4V1
written-down-on-paper standard for film encoding.
Which means they already have quite an edge
because if you look at the output of their V1 and
their V3 codecs, you will notice how much better
V3 deals with low (800-- kbit/s) bitrates. These
movies of course are ~512 Pixels (and up) in X
resolution, for 1.85:1 you see 224 pixels in Y
direction, pirated movies have around ~640x288
pixels in case you never seen one. Compare that
to the unplayable 12.5 fps stamp-sized demos on
3ivx' webpage, there's a difference isn't it.
As for Windows Media Encoder 8, while their AAC
implementation now cuts off at 16khz and still
stinks at anything above 64kbit/s compared to
MP3@128 (wme7 cuts off at 20 but lacks sound
transparency just like wme8), the new WME8
codec is now slightly better than DiVX;-) even.
The visible-macroblock plague from V3 is very
well hidden now without smearing the picture,
which is quite a stunt at 500 kbit.
Thinking three years ahead, if you should be able
to once buy&download movies in MPEG4, you can
certain that MS will be supplying the codec,
because (once again) piracy has bought MS a huge
marketshare. Some russian chap even ported the
codec to Linux by emulating DirectShow DLL calls
(ouch). Combine this with a P3-Nvidia-5.1-Dolby
Digital-whizzbang X-Box and you can get a glimpse
what your kids may want for x-mas 2002 B).
You always get your pictures from space 24 hrs
late to make them unusable for tactical purposes
during times of war. AND I bet you 10 bucks the
US government gets every single coordinate from
which you requested shots to be taken. Maybe even
as soon as you submit them, so you can imagine
busy towing of new stuff into hangars once their
bird gets close for a shot.
Not that the Russians would care, their RESURS F14
is still flying over Groom Lake at an altitude of
230 km (82.1 deg steep inclination) with several
course corrections having been made.
Sometimes a who, what and when is more precious
than not letting them have the info in the first
place, which is getting harder because you can
already buy old 2m resolution birds anyway.
Assume you got to OJ's place that day before the
police did come in. Would you go look around,
touch knifes gloves and whatnot? Nooo... so your
carelessness has got you into trouble now, even
if it is just Internet and "real life".
My advice, don't do any really illegal shit and
don't let your curiosity push you too far into
possible trouble. If police comes to ask
questions, you should have nothing to worry
about. If they still insist on taking your stuff,
you should have a DAT backup from at most one
month away at your parents house anyway.
I wasn't talking about people who are smart
enough to use a "secure by default my ass"
BSD instead of easily rootable Linux RH 6.x
okay? So relax. I hope you don't have any
non-audited daemons running. I was talking
about the growing pain-in-the-butt-crowd of
"installed linux yeehaa cool" people, who
constantly manage to annoy me because they
give script kids an unattended playground.
Whenever I get portscanned I hack back and do
a chkconfig --del network, change root passwd
to some shit, and then shutdown -h now the whole
damn thing. If you did that too, the Internet
would be a much nicer, and quieter place!
We are doing a university project that aims at
defeating all known audio watermarking techniques.
So far we killed EVERY SINGLE ONE using a mixture
of techniques including inaudible transforms in
the frequency domain, jitter in the time domain
and very funny huffman shuffling of the bitstream,
making it 1% larger because we also apply a
reverse psymodel where inaudible frequencies
are actually added instead of eliminated.
We only have an mp3 bitstream specific test tool
right now but adapting this to AAC is no big
deal (we chose mp3 because of its popularity).
Of course you need a decoder source for this
but once you have one, you can start mess up the
bitstream all the same.
I work on that project because frankly, SDMI can
kiss my behind. Too bad them guys have too little
brain mass! Sitting duck, their watermark is.
Not true. The original Xing was hacked on an
NT machine but Xing would not even run on NT
at that time so the target was unpacked manually
without even clicking any Agree button. The
northlanders may have used Win9X later but the
first hack utilized manually unpacked files.
I don't know what the first DVD used with DeCSS
was, but I know the first disk authenticated with
code that was NOT some DVD-player software was a
copy 5th Element, July 1999.
Read ORBS' hall of shame: MAPS is playing evil
on
MAPS vs. ORBS
·
· Score: 1
Do you trust somebody who gets paranoid about competition, blacklists them even, and to really top things, gets routing people at a large ISP to actively push blackhole routes for ORBS' network, misdirecting packets into their own network (to dump the packets of course). If MAPS was the size of Microsoft, I'd call it another case of anti-trust investigation candidate. Paul Vixie, get a nicer tie, yours doesn't fit your new 'competitive' attitude.
Slashdot Mirror
Engineers at Cisco Systems have known about this problem for a long time. Being in the field more often then at home, they came up with WRED, weighted random early drop. This method has enabled them to reduce buying toilet paper for their own home use to a very manageable small number of times a year. Clever.
Panic 12 as described in the article is most likely a hardware fault somewhere on the mainboard. It is by far the most common cause of a panic on FreeBSD. Exchange mainboard, CPU and memory against working components and you are back up and running without the panics.
Slightly adapted story from chinese literature,
and direct answer to all posts for this story:
Once upon a time an immigrant applied for a job at
Microsoft as a floor cleaner. The interview went
well and finally they went to arrange the details.
The interviewer told him: "Please write down your
e-mail address and we will send you the documents"
The immigrant replied: "I don't have a computer"
The interviewer gasped and said: "You don't have
any computer? Geee you can't work for us then we
are Microsoft!"
The immigrant went away and from his last three
bucks he bought tomatos and sold them. He did this
day after day, week after week, month after month
until he had earned enough to hire employees, buy
a storehouse, his business did go well.
Years later, he went to see a retirement advisor
to help invest his money wisely. The advisor came
up with a plan and finally said: "So give me your
e-mail address and I will send you the documents"
The immigrant replied: "I don't have a computer."
The advisor couldn't believe that and asked: "How
did you ever get that rich without a computer?"
To that he replied: "If I did have a computer,
I would be cleaning the floor at Microsoft now".
Actually you can play a little tempest on your
own using a recent PGP version with "tempest-safe"
fonts. Why? Your monitor emits radiation at a
range of frequencies and those most easily visible
are the higher ones because they carry a higher
energy (E=freq*h_const, physicist Max Planck
figured that one out around 1900).
So a font that is low-pass filtered eliminates
the high-frequency components in your monitor's
emissions and all the cheap guys see is a window
with nothing in it (your eyes are good enough of
course to still see the letters in light gray
over not-so-light gray).
Mind you this is not limited to CRTs because the
LCDs also use CRT controllers with high-MHz pixel
frequencies and are therefore also "visible".
Another source, should you be concerned, is your
keyboard, which most likely transmits AM signals
at a couple 100 kHz over not 100% shielded copper.
Today the FBI may bug your keyboard with a little
microcontroller, tomorrow they may make the tree
next to your room listen for long-wave AM radio.
Or if they really are after you they will listen
for data transmissions from your brand-new
Serial-ATA drive, using multi-million dollar
wireless equipment, while you save unencrypted
documents to your disk.
Did I scare you? No reason to be, because the
first countermeasure is always acknowledging
that there is a problem. One way surely is to
read John's excellent articles on cryptome.org
(do follow the links if you are curious).
Happy New Millenium
From Germany.
You are fully correct but didn't I say just that? I left out Gej and Max to cut my comments short, but you are right there too, I even once wrote them and asked them if they were good enough to go from cracker to MPEG4 codec developers and there was no reply. The WMA audio vs. MP3 thing was just a sidenote.
So much hype, so little news.
;-) even.
First, there is only a 3ivx decoder which in fact
is a Quicktime 4 plugin. The de-facto standard
these days is a AVI-encoding enabled (i.e.patched)
version of Microsoft's MPEG4 V3 DirectShow filter
and that DS code alone is worth three months of
writing and debugging. But then, to make a codec
you need an encoder as well and this is also still
missing. But that is not the most difficult part.
Microsoft has spent a huge amount of work on
improvements for the original, specified MPEG4V1
written-down-on-paper standard for film encoding.
Which means they already have quite an edge
because if you look at the output of their V1 and
their V3 codecs, you will notice how much better
V3 deals with low (800-- kbit/s) bitrates. These
movies of course are ~512 Pixels (and up) in X
resolution, for 1.85:1 you see 224 pixels in Y
direction, pirated movies have around ~640x288
pixels in case you never seen one. Compare that
to the unplayable 12.5 fps stamp-sized demos on
3ivx' webpage, there's a difference isn't it.
As for Windows Media Encoder 8, while their AAC
implementation now cuts off at 16khz and still
stinks at anything above 64kbit/s compared to
MP3@128 (wme7 cuts off at 20 but lacks sound
transparency just like wme8), the new WME8
codec is now slightly better than DiVX
The visible-macroblock plague from V3 is very
well hidden now without smearing the picture,
which is quite a stunt at 500 kbit.
Thinking three years ahead, if you should be able
to once buy&download movies in MPEG4, you can
certain that MS will be supplying the codec,
because (once again) piracy has bought MS a huge
marketshare. Some russian chap even ported the
codec to Linux by emulating DirectShow DLL calls
(ouch). Combine this with a P3-Nvidia-5.1-Dolby
Digital-whizzbang X-Box and you can get a glimpse
what your kids may want for x-mas 2002 B).
Merry Christmas
from Germany.
You always get your pictures from space 24 hrs
late to make them unusable for tactical purposes
during times of war. AND I bet you 10 bucks the
US government gets every single coordinate from
which you requested shots to be taken. Maybe even
as soon as you submit them, so you can imagine
busy towing of new stuff into hangars once their
bird gets close for a shot.
Not that the Russians would care, their RESURS F14
is still flying over Groom Lake at an altitude of
230 km (82.1 deg steep inclination) with several
course corrections having been made.
Sometimes a who, what and when is more precious
than not letting them have the info in the first
place, which is getting harder because you can
already buy old 2m resolution birds anyway.
Assume you got to OJ's place that day before the
police did come in. Would you go look around,
touch knifes gloves and whatnot? Nooo... so your
carelessness has got you into trouble now, even
if it is just Internet and "real life".
My advice, don't do any really illegal shit and
don't let your curiosity push you too far into
possible trouble. If police comes to ask
questions, you should have nothing to worry
about. If they still insist on taking your stuff,
you should have a DAT backup from at most one
month away at your parents house anyway.
(in case your flat catches fire, eh Hemos)
I wasn't talking about people who are smart
enough to use a "secure by default my ass"
BSD instead of easily rootable Linux RH 6.x
okay? So relax. I hope you don't have any
non-audited daemons running. I was talking
about the growing pain-in-the-butt-crowd of
"installed linux yeehaa cool" people, who
constantly manage to annoy me because they
give script kids an unattended playground.
Whenever I get portscanned I hack back and do
a chkconfig --del network, change root passwd
to some shit, and then shutdown -h now the whole
damn thing. If you did that too, the Internet
would be a much nicer, and quieter place!
I am happy the NZ government intends to help me.
We are doing a university project that aims at
defeating all known audio watermarking techniques.
So far we killed EVERY SINGLE ONE using a mixture
of techniques including inaudible transforms in
the frequency domain, jitter in the time domain
and very funny huffman shuffling of the bitstream,
making it 1% larger because we also apply a
reverse psymodel where inaudible frequencies
are actually added instead of eliminated.
We only have an mp3 bitstream specific test tool
right now but adapting this to AAC is no big
deal (we chose mp3 because of its popularity).
Of course you need a decoder source for this
but once you have one, you can start mess up the
bitstream all the same.
I work on that project because frankly, SDMI can
kiss my behind. Too bad them guys have too little
brain mass! Sitting duck, their watermark is.
Not true. The original Xing was hacked on an NT machine but Xing would not even run on NT at that time so the target was unpacked manually without even clicking any Agree button. The northlanders may have used Win9X later but the first hack utilized manually unpacked files.
I don't know what the first DVD used with DeCSS was, but I know the first disk authenticated with code that was NOT some DVD-player software was a copy 5th Element, July 1999.
Do you trust somebody who gets paranoid about competition, blacklists them even, and to really top things, gets routing people at a large ISP to actively push blackhole routes for ORBS' network, misdirecting packets into their own network (to dump the packets of course). If MAPS was the size of Microsoft, I'd call it another case of anti-trust investigation candidate. Paul Vixie, get a nicer tie, yours doesn't fit your new 'competitive' attitude.