TriCrypt
This page is a demonstration of the TriCrypt class which can be used to encrypt single line alphanumeric
strings such as IDs or querystrings.
The encryption algorithm is a multiply and shift and is based on a trigraph (groups of three characters).
The only characters handled are digits 0 - 9 and upper and lower case letters.
This code is Freeware and is currently in use in commercial applications.
A copy is posted on Evil Walrus or can be viewed as a text file
Multiply key
Add key
Plain text
Cypher text
 
Multipy key must not have any common factors with 238328
that is odd and not divisible by 31
both keys must be less than 238328
Once a string has been encrypted the same keys must be used to decrypt it