Archive for the ‘Cryptography’ Category

Cracking a Software License Scheme

In his latest blog post, Andy Sloane issued a challenge to create a key-generator for his bespoke software licensing scheme.
Looking through his code, I quickly found that he was using RSA, and that valid keys decrypted to 12345678 under a hardcoded RSA public key.
In my response on the Reddit discussion, I explained creating a keygen [...]