TY - GEN AU - Bauer, Craig. P TI - Unsolved: The History and Mystery of the World's Greatest Ciphers from Ancient Egypt to Online Secret Societies SN - 9780691167671 PY - 2017/// CY - New Jersey PB - Princeton University Press KW - Ciphers - History KW - Ciphers - Problems, Exercises, etc KW - Computers / Security / Cryptography. Bisacsh KW - Computers / Computer Science. Bisacsh KW - Mathematics/ Recreations & Games. Bisacsh N1 - Hardcover ER -