I have done a small experiment in steganography using DCT coefficients and spread spectrum technique, spreading a 4 bit number in 4 high frequency coeficients in a DCT transformed image
It works pretty well.. but I did it in PHP+GD, so it's pretty slow...
if anyone is interested, I have a paper that describes the methods, the PSNR and everything else... you can reach me at my gmail server, under the dangil alias
the next virus will be distributed via Mac... the mac users won't be affected, obviously, but it will affect every PC user who has email contact with a Mac user...
drop iChat, download the Developer Tools and the X11 enviroment, download the gaim sourcecode and compile yourself your own jabber + AIM + whatever client !
we are not questioning the elected government... we are questioning the technical quality of the equipament !
technically, the machines are used since 1998 without problems.
I am involved in the voting process. I know the process. I know how it works. it's simple and efficient.
regarding safety, each party has at least 1 person on each voting machine watching the whole process at all times. I guess fraud is pretty difficult to occur on those circunstances. there are at least 20 parties here. of course only 2 or 3 with real chances, but the small parties make a lot of noise when something is fishy
they watched too much Full Metal Panic, the anime. the main character, Sagara, is a para-militar undercover in high-school. whenever he thinks his locker has been violated he just blows it up. why ? because "it could contain explosives"
just great stuff. specially the second season, Full Metal Panic Fumoffu.
The movie is calledRunaway. And is one of my favorites. A Michael Crichton movie ! Tom Selleck, Gene Simmons, Kirstie Alley. the future, as seen in 1984. great stuff
Tom Selleck Already Knew how to handle those in the 80's.. who remembers the movie Runaway ? the bad guy literally had bullets with your name written on. and those spiders... OMG... I had nightmares with those... I was 6 when I first watched this movie...
and it is a movie by Michael Crichton ! he is a genius...
yeah.. the new protocol should have a "user has sent e-mail to this account" on the server that originated the e-mail. so when the server that received the e-mail asks the first server if the users is valid, the first server will respond "no, this user is valid and it can send e-mail, but it did not send e-mail to this address.. sorry"...
ban SMTP, block port 25, develop a new mail protocol, upgrade of every mail client on the internet and the spam problem (and everything that goes with it) is gone. in the mean time, develop a man-in-the-middle transparent proxy approach solution in every ISP so you don't have to change every mail client on every computer right away.
the new protocol should have a sender and recipient check, so on every server it passes thru it gets checked (the server calls the apropriate authority server according to the domain responsible for the username). perhaps, for performance issues, only the final destination server should check if the sender address really exists and is a valid sender (a can send e-mails here flag perhaps). example:
mail from: daniel@server1.com rcpt to: dan@server2.com
when this e-mail is received by server2, it calls server1 to check if user daniel is a valid sender . at server2, sysadmin can configure what kind of action it should take : if server1 does not exist, if user does not exist at domain, if user cant send, or if user can send.
this is a way to end e-mail spoofing, and other bad things that go with it...
to sum up, the only way out is to dump smtp all together
Slashdot Mirror
I have done a small experiment in steganography using DCT coefficients and spread spectrum technique, spreading a 4 bit number in 4 high frequency coeficients in a DCT transformed image
It works pretty well.. but I did it in PHP+GD, so it's pretty slow...
if anyone is interested, I have a paper that describes the methods, the PSNR and everything else... you can reach me at my gmail server, under the dangil alias
what about matroska ?
isn't it supposed to be binary XML ?
I for one welcome our alien overlords
we have these in Sao Paulo, Brazil for ages
I for one welcome our mechanical overlords
I just had this ideia yesterday, when I saw the radiator on my friend's F650 BWM bike...
I guess a motorcycle radiator will be best suited for PC cooling than a car radiator, don't you think ?
I [url=http://linux.macbbs.com.br/6100.html]have[/ur l]
Apple used peltiers on the Powermac 6100... those PowerPC 601 where hot !
Apple, as aways, is 10 years ahead on some fronts, and 2 years behind on others...
gmail raid
first post !
the next virus will be distributed via Mac... the mac users won't be affected, obviously, but it will affect every PC user who has email contact with a Mac user...
drop iChat, download the Developer Tools and the X11 enviroment, download the gaim sourcecode and compile yourself your own jabber + AIM + whatever client !
remember to check those lib dependencies !
we are not questioning the elected government... we are questioning the technical quality of the equipament !
technically, the machines are used since 1998 without problems.
I am involved in the voting process. I know the process. I know how it works. it's simple and efficient.
regarding safety, each party has at least 1 person on each voting machine watching the whole process at all times. I guess fraud is pretty difficult to occur on those circunstances. there are at least 20 parties here. of course only 2 or 3 with real chances, but the small parties make a lot of noise when something is fishy
please, just call Brazil and ask for some 'urnas eletronicas' or e-voting machines . ours is the best... working fine since 1998
www.brasil.gov.br
I read the POTS all right.. but as in yidich ... that means idiot...
why ? because it is my birthday !!!
ohh, I got it.. Aliens... ok..
they watched too much Full Metal Panic, the anime. the main character, Sagara, is a para-militar undercover in high-school. whenever he thinks his locker has been violated he just blows it up. why ? because "it could contain explosives"
just great stuff. specially the second season, Full Metal Panic Fumoffu.
references please !!!!...
The movie is calledRunaway. And is one of my favorites. A Michael Crichton movie ! Tom Selleck, Gene Simmons, Kirstie Alley. the future, as seen in 1984. great stuff
Tom Selleck Already Knew how to handle those in the 80's.. who remembers the movie Runaway ? the bad guy literally had bullets with your name written on. and those spiders ... OMG... I had nightmares with those... I was 6 when I first watched this movie...
and it is a movie by Michael Crichton ! he is a genius...
yeah.. the new protocol should have a "user has sent e-mail to this account" on the server that originated the e-mail. so when the server that received the e-mail asks the first server if the users is valid, the first server will respond "no, this user is valid and it can send e-mail, but it did not send e-mail to this address.. sorry"...
ban SMTP, block port 25, develop a new mail protocol, upgrade of every mail client on the internet and the spam problem (and everything that goes with it) is gone. in the mean time, develop a man-in-the-middle transparent proxy approach solution in every ISP so you don't have to change every mail client on every computer right away.
:
the new protocol should have a sender and recipient check, so on every server it passes thru it gets checked (the server calls the apropriate authority server according to the domain responsible for the username). perhaps, for performance issues, only the final destination server should check if the sender address really exists and is a valid sender (a can send e-mails here flag perhaps).
example
mail from: daniel@server1.com
rcpt to: dan@server2.com
when this e-mail is received by server2, it calls server1 to check if user daniel is a valid sender . at server2, sysadmin can configure what kind of action it should take : if server1 does not exist, if user does not exist at domain, if user cant send, or if user can send.
this is a way to end e-mail spoofing, and other bad things that go with it...
to sum up, the only way out is to dump smtp all together
I was reading the comments just to find a evangelion related comment... now that I found I can return to my coffin and sleep forever again...
this " MS will have to do something, sometime, somewhere " headline is old... and I never see something really happening...
it's just stupid...