Decoding a file with repetitive XOR encryption is pretty easy. The only way that this will be even remotely secure is if the encrypted file is the same length or less then the length of the key file. The danger then becomes transmitting the key file securely. This is called a one-time pad. It is important that this key never be used again, or it can be cracked.
Obviously, this is NOT a good idea for anything other then research purposes, but it is a good way to learn about the dangers of improper encryption. AnthraX101 On Mon, 25 Oct 2004 14:41:10 -0400, Mike Hoye <[EMAIL PROTECTED]> wrote: > On Mon, Oct 25, 2004 at 08:33:41AM -0700, Denis Dimick wrote: > > Use GPG and keychain to store the key. > > I've written a little widget that lets you "encrypt" a file using > another file as the "key"; I put those things in quotes because > it's a dumb little thing that does a quick-and-simple xor of the > first file against the other. I realize that this is barely > something you'd call encryption, but it might fill your needs. > > It's called xork and it comes with no warranty whatsoever. > > http://off.net/~mhoye/xork/ > > If anyone who is smarter than I am would like to suggest anything, > I'd be glad to hear it. > > - Mike Hoye > > -- > Whenever I hear the question "Did you reboot?", I think of frat guys > in college saying "Didja fuck her?" - Scot Kurruk > > > > _______________________________________________ > Full-Disclosure - We believe in it. > Charter: http://lists.netsys.com/full-disclosure-charter.html > _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
