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 Posted: Tue, 3rd Jul 2007 09:30 Post subject: cryptography progs |
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Hello friends, i was wondering if some of you out there has ever tried out personally some way to decipher encrypted files ?
Just like the ones created by using some software like Truecrypt or PGP.
There are only 10 kinds of people : those that understand binaries and those that don't.
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| Posted: Tue, 3rd Jul 2007 13:25 Post subject: |
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ok
here's what you need;
1. all the computers in the world
2. a billion years
3. PROFIT!!111
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| Posted: Tue, 3rd Jul 2007 23:25 Post subject: |
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or chloe
seriously though.. forget it
guesswork is the only tool with even the slightest chance of working
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| Posted: Wed, 4th Jul 2007 00:48 Post subject: |
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@ eliz : ahah 
@ s_hole : thanks for the opinion, since it's a bit of time that i use that way of protecting sensible data i was starting to wonder if there could be a doable way of deciphering those kind of encrypted files. for the guesswork i'm comfortably sure that i'll never forget the password and that's a rather not-guessable one, since it's a dear to me phrase of 25 letters
thanks again for your comment.
There are only 10 kinds of people : those that understand binaries and those that don't.
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| Posted: Wed, 4th Jul 2007 06:57 Post subject: |
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if it's 25 letters chosen with a logic, then it's guessable
truecrypt supports file keys
you could just make like a half a meg file or random data and put it on a USB stick in a key chain
that way nobody can use it without knowing there's a file they must use, let alone it being on that memory stick
just keep a backup copy somewhere
why? are cops closing in on your child pornography?
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| Posted: Thu, 5th Jul 2007 15:25 Post subject: |
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| s_hole wrote: | if it's 25 letters chosen with a logic, then it's guessable
truecrypt supports file keys
you could just make like a half a meg file or random data and put it on a USB stick in a key chain
that way nobody can use it without knowing there's a file they must use, let alone it being on that memory stick
just keep a backup copy somewhere
why? are cops closing in on your child pornography? |
uhm ... it is a phrase that hit me when i first read it, on a book over ten years ago. so even if is a phrase i am sure there is no one in the world that can guess it. so that way i'm rather sure my files won't be touched.
yeah i saw of the key possibility, but since they are files i often use during the day in office it's a bit uneasy to put in the USB stick every time.
without taking it as an offense, because i'm sure you didn't mean that, no i'm not that bastard and disgusting kind of man that likes child pornography.
all of this security is simply because i want to hide all the programs i use in office that i don't want to emerge should i one day be absent for some weeks, instant messaging ones, a few games, some p2p programs, a couple of newsgroups readers, etc.
Thanks for your interest.
There are only 10 kinds of people : those that understand binaries and those that don't.
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| Posted: Thu, 5th Jul 2007 16:36 Post subject: |
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yea, i take some 'unlicenced' software to work every now and then to make my job easier, but i make sure it stays on the usb stick
they'd fry my ass if they caught me putting unbought company software on the machine
but an encrypted virtual drive works just aswell
also, if it's a logical phrase, like a line from a book, it is very much crackable with a dictionary approach
would probably take days or weeks, but still
mix in some numbers atleast
l1k3 7h1s f0r 3x4mple
though, i'm doubtful anyone would be that interested
especially if you name the image file to seem like a system file, but not exactly so it won't get deleted by accident
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| Posted: Thu, 5th Jul 2007 22:00 Post subject: |
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yeah it's always a nice thing to keep hidden those kinds of activities from the company where we work, being fired for using some not allowed software is not something i would like to try
inside the logical phrase is present an absolutely fantasy name, take an example like anthrpraxilus, very unlikely to be included in a dictionary (however possibile who knows).
yeah i understand that mixing numbers and maybe upper lower case and even special characters is way better ... keep present however that the most "bright" computer expert in my company keep asking me regularly after a couple of years how to resize an excel row ... so this is more of an adequate protection from the folks in my company, mine is more a theorical discussion for the pleasure of doing it and in the remote event that one day some skilled guy for some reason get his hands on my pc and gets his curiosity on my files.
for the name of the encrypted file usually i keep it together with a list of regular backups of several other files with a name similar to those ones (yeah a risk a little bit to delete it accidentally but it's a very low risk, i always pay attention)
but so is theorically possible so to use a brute force approach against an encrypted file ? and if i add the need of a key ? (of course camouflaged & somewhere hard to guess)
There are only 10 kinds of people : those that understand binaries and those that don't.
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