You could do worse than to confuse the meanings of "code" and "cipher"—even cryptographers sometime use the terms as though they had the same meaning. There is, however, a definite distinction between ...

Learn how to implement a classic substitution cipher in C! This step-by-step tutorial walks you through encoding and decoding messages by replacing each letter with another according to a fixed key. A ...

Possibly, the earliest known cryptogram (or substitution cipher) is the Caesar Cipher, supposed to have been used by Julius Caesar. Possibly, the earliest known cryptogram (or substitution cipher) is ...

There's a lot to know about encryption, and the ins and outs can get confusing. Here's a rundown of what professionals need to know about this fundamental of modern computing. Data: It’s everywhere, ...