TY - BOOK T1 - Elementary cryptanalysis :a mathematical approach / DA - [1966] CY - Washington : Mathematical Association of America, AU - Sinkov, Abraham, CN - Z104 .S47 CN - Z104 PP - Washington : Mathematical Association of America, PY - [1966] ID - 64338 KW - Cryptography. KW - Ciphers. TI - Elementary cryptanalysis :a mathematical approach / ER -