Sixword encodes binary data in a human-friendly format using English words. It uses the 6-word binary encoding created for S/Key (tm) and standardized by RFC 2289, RFC 1760, and RFC 1751. Binary data is encoded using a dictionary of 2048 short English words (1-4 letters in length). Each block of 64 bits is encoded using 6 words, which includes 2 parity bits for error checking. This is ideal for transmitting binary data such as cryptographic keys where humans must communicate or enter the values. See also: Bubble Babble, PGP Word List, Diceware, Base64, Base32