One way is to encrypt the message—that is, use a secret code that only you ... the earliest and most widely known ciphers. It is a simple form of a “substitution cipher” where you replace ...

Ars' own Julian Sanchez has deciphered a code embedded into the TV show ... What Sanchez worked out was a simple monoalphabetic substitution cipher. Each picture shown was a combination of three ...

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 ...

The FBI today challenged anyone in the online community to break a cipher code on its site ... A relatively basic form of substitution cipher is the Caesar Cipher, named for its Roman origins.

“Each letter stands for another one,” said Hannah. “Ooh, a substitution cipher!” I thought. But I was stumped. “Is this just one word?” I asked. “No, I’ve removed all the spaces ...

The code had ... said the 340 cipher had been cracked “with a massive search through many candidates using sophisticated software which can efficiently solve homophonic substitution ciphers.” ...

The mathematical intricacies behind AZDecrypt are intense—but just for reference, the codebreakers say their program can solve up to 200 homophonic substitution ciphers per second with a 99 ...