A better title would be "How RSA does not work". I'm a bit annoyed by many of these crypto introductions that explain textbook RSA, which is not something anyo

A better title would be "How RSA does not work". I'm a bit annoyed by many of these crypto introductions that explain textbook RSA, which is not something anyone uses in a real world application. It is crucial for RSA to use a padding mode and that's where all the fun comes in and what decides about how secure the thing you're building is.