This is the second article in a series on Cryptography for the Everyday Developer. Follow along to learn the basics of modern cryptography and encryption. --- A cipher is only useful if it is secure. What makes a cipher secure? Let’s remember the use case for classical ciphers — keeping messages confidential. Caesar’s cipher and Vigenère’s cipher both suffer from a similar flaw, which makes them insecure and unusable for secure communication. For both ciphers, the flaw is obvious —...
