I am actually not sure if this isn't more of a problem of RSA than a feature. I have seen many simple introductions to some cryptography that try to explain RS

I am actually not sure if this isn't more of a problem of RSA than a feature. I have seen many simple introductions to some cryptography that try to explain RSA. The problem is: They're almost always wrong and explain some insecure variation of RSA. (Most of the time they talk about a "Message" as the input to the RSA function without ever explaining the concept of padding and why this is important in RSA.) The thing is: Implementing some form of RSA is relatively easy. Implementing RSA in a secure way is far from trivial.