TUCoPS :: Crypto
:: upc.txtThe CueCat UPC-A Cipher (or why writing a program to "decode" CueCat output is trivial) |

divide the UPC into 4 groups of three digits use the scheme below to translate each digit into its output 1 2 3 0 C3 n Z 1 CN j Y 2 Cx f X 3 Ch b W 4 D3 D 3 5 DN z 2 6 Dx v 1 7 Dh r 0 8 E3 T 7 9 EN P 6