Patent ID: 8264910

Claim:
A watch able to be used as a cryptographic system to encrypt plaintext to ciphertext or decrypt ciphertext to plaintext, comprising: a watch face; and at least three concentric rings, each of the least three concentric rings being rotatable with respect to the watch face and including a number of symbols, the number of symbols corresponding to the number of hours represented on the watch face, at least some of the symbols corresponding to letters of an alphabet, characters in a writing system and/or numbers, at least one of the least three concentric rings being rotatable in a direction opposite to a direction of at least one other of the least three concentric rings, wherein the symbols corresponding to letters of an alphabet, characters in a writing system and/or numbers as a cryptographic system are arranged in a configuration that enables encryption of plaintext to ciphertext or decryption of ciphertext to plaintext.