@BOOK{ Book!D - 99684586,
AUTHOR = "/ Henry Beker and Fred Piper",
TITLE = "Cipher systems ",
LIBRARY= "کتابخانه پرديس 2 دانشکده‌های فنی دانشگاه تهران",
SUBJECT = "Ciphers,Cryptography",
URL = "/book/99684586/Cipher-systems/"}