Greetings Cypherpunks. After a lengthy test period, I am releasing the first official version of OTP-PC (there is no change from the beta version). The file otp-10.zip may be found on: wuarchive.wustl.edu /pub/MSDOS_UPLOADS/cryptography (the same directory as Secdev) I have also posted the file to the cypherpunks directory on soda.berkeley.com. Attempts to find out when/where otp will be posted on soda have not been answered. (My cypherpunks mail has stopped, so there may be a problem there) If you problems finding otp-10.zip, please send me a message and I will send it to you via PGP ASCII-armor. If any one can provide a FTP site for me to post OTP-PC, please let me know. Description: ------------- This is the first public release of OTP-PC, which is a MS-DOS implementation of the one-time pad or Vernam Cipher. The one-time pad is the only encryption method proven to be unbreakable. Complete source, of course! OTP-PC features: -Automatic compression of plain text messages prior to encryption. Compression reduces consumption of the pad, and masks the size of the original document. (compression can be overridden) -Automatic wiping of the pad (codebook), to prevent reuse on both encryption and decryption. -Wiping and deletion of intermediate compressed files. -Two stage cipher text headers. The first stage header is un- encrypted, and contains information needed to start decryption. The second stage contains sensitive information (CRC etc), and is encrypted. -A 32 bit CRC stored in the encrypted header verifies reconstruction of the original file. -A verbose mode which displays encryption/decryption statistics. Thanks, Jim Pinson -Galapagos jpinson@fcdarwin.org.ec