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Is PC1 a stream cipher implemented in a "clean room", by reference to an abstract specification of the algorithm implied by the Alleged-RC4 source code, that interoperates with RC4-40 ? <<<<<
Yes, I wrote it in Pascal (Delphi) using only the English pseudo-code provided by Bruce Schneier in the 2nd edition of Applied Cryptography. I call my implementation PC1 to avoid any possible trademark hassles. The sample RC4 vector that the State Dept. sent me for my Commodity Jurisdiction request showed that my implementation is correct. And of course, there are no patents to worry about and I'm not under any non-disclosure agreements. RSADSI's government-sponsored monopoly on 40-bit exportable encryption is over. I generate a key by combining a 40-bit pseudo-random salt with 40-bits of secret key material. The secret key material is the lower 40-bits of a salted pass-phrase after running through a SHA-1 hash. All the specs and file formats are included with the documentation. Kent Puffer is available at http://execpc.com/~kbriggs - --- [This message has been signed by an auto-signing service. A valid signature means only that it has been received at the address corresponding to the signature and forwarded.] -----BEGIN PGP SIGNATURE----- Version: 2.6.2 Comment: Gratis auto-signing service iQBFAwUBMS5jYCoZzwIn1bdtAQF6dwF/XrD1BgPpNbvh1ZDq5bYg52q3PpYpBchj 3BbJgjS0FudNzkysl65vo4klEDEyHYb9 =9frt -----END PGP SIGNATURE-----