My previous article on Clarion TPS files left one big question unanswered: how do encrypted TPS files work and is it possible to decrypt them. In this post I will dissect the encryption algorithm and explain how it works. It involves quite a bit of binary arithmetic and hexadecimal numbers, so take a deep breath before diving in!
First there is the password. It is passed as a parameter to the TPS driver. Oddly enough it is called the 'owner' parameter. With the password a key is generated which is used to encrypt and decrypt the data. The effect is pretty dramatic.
