Algorithm: Select bit-groups of random length from the file until the file is completely processed. Shuffle the bits in each group randomly and save each group back to the file. Repeat if needed using different key-strings for each successive encryption, for increased security.

You pay no attention whatsoever to key distribution, the fact that this is just a form of permutation and no substitution is used, also how do you account for the fact that the user`s random number source may not be strong, even recognized rng`s like the keyboard latency routines in pgp grind to a halt when faced with a hardware perculiarity like a keyboard buffer etc... Datacomms Technologies web authoring and data security Paul Bradley, Paul@fatmans.demon.co.uk Http://www.fatmans.demon.co.uk/crypt/ "Don`t forget to mount a scratch monkey" -----BEGIN PGP PUBLIC KEY BLOCK----- Version: 2.6 mQCNAjH9j+cAAAEEAMBvREiQR0ot9dFCO0TiSCSunAYLv2g1Bc6I3bz8FzKXNH53 6mieJf/W4rD+CxJpT0q9RQaaoRtkHJLwbjfK2il3D7mEahMAyqvF/xRJNqkXfhM3 sRJM0Jh43l+W0M5vwokbEbk25/bxWWGspTsLD3YHbzKnG6pOcL5OPIRbv66xAAUR tCdQYXVsIEJyYWRsZXkgPHBhdWxAZmF0bWFucy5kZW1vbi5jby51az4= =riHc -----END PGP PUBLIC KEY BLOCK-----