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 ...

The BitLocker encryption method and Cipher strength you set as default is only applied when you turn on BitLocker for a drive. Any changes you make will not affect a drive already encrypted by ...

An encryption method that works with continuous streams of input rather than fixed blocks. Bytes of plaintext go into the stream cipher, and bytes of encrypted text come out the other end. RC4 is an ...

The mechanics of the Double Playfair are involved enough that it is expected that solving this cipher would be most readily achieved by a computer program that recovers the first square by shifting ...