Art of the Problem on MSNOpinion

Diffie-Hellman and the one-way function, the math that secured the internet

Hidden inside a simple color-mixing analogy is one of the most elegant ideas in cryptography, a mathematical trap door that ...
The Irish Times

Modular arithmetic: you may not know it but you use it every day

You may never have heard of modular arithmetic, but you use it every day without the slightest difficulty. In this system, numbers wrap around when they reach a certain size called the modulus; it is ...