Come And Go Encryption (CAG) is a simple program to encrypt files with a special key. This key is a random garbage file, and it is XOR-ed with the file to render it unusable by normal methods. It uses the principle of the one-time pad, but it is not unbreakable. It can stream the decrypted file to STDOUT for use in pipes (i.e., mplayer movie viewing, xv image viewing, etc.).