Text message encryptor — MD5 signatures over an XOR cipher.
Pawn Crypt uses MD5 cryptographic signatures on top of an XOR text encryption algorithm. It is designed for sending messages from anywhere on the Internet, without access to other encryption software. It will not become confused by text wrapping, missing text, or other mistakes that occur during transmission. By running along a 64-character set, it will not garble binary values, or cause a browser to crash. For this reason, it is especially suited for public free email providers.
Pawn Crypt defeats word-based or probability-based attacks, as well as overcoming methods which measure statistics based on consistent input-output.
Pawn Crypt is faster than other programs, by reducing cryptology running time primarily to internal bit operations, compatible with JavaScript browsers, instead of auxiliary functions.
Pawn Crypt is offered as-is, without warranty. Although the underlying Alpha Crypt algorithm is one I would feel safe trusting, no legally binding guarantees are made, express or implied. You have the freedom to be secure, but freedom is also your own responsibility. No liability is taken from any use of this software.
Pawn Crypt is an interface re-skin of the original Alpha Crypt project. For the original distribution, a zip file is available, alphacrypt2.zip (5.15 KB: contains alphac.html, timer.js, md5.js, and alphac.js).
The encryption engine is entirely Alpha Crypt by Joseph Myers, unmodified. MD5 code (md5.js) by Joseph Myers is based on md5.js by Paul Johnston and Greg Holt.
Programs in this list are used, unmodified from the original Alpha Crypt release: