Bookcover of BEAR and LION Ciphers
Booktitle:

BEAR and LION Ciphers

Betascript Publishing (2010-09-06 )

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ISBN-13:

978-613-2-49196-1

ISBN-10:
6132491961
EAN:
9786132491961
Book language:
English
Blurb/Shorttext:
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The BEAR and LION block ciphers were invented by Ross Anderson and Eli Biham by combining a stream cipher and a cryptographic hash function. The algorithms use a very large variable block size, on the order of 213 to 223 bits or more. Both are 3 round generalized Feistel ciphers, using the hash function and the stream cipher as round functions. BEAR uses the hash function twice with independent keys, and the stream cipher once. LION uses the stream cipher twice and the hash function once. The inventors proved that an attack on either BEAR or LION that recovers the key would break both the stream cipher and the hash. In cryptography, a block cipher is a symmetric key cipher operating on fixed-length groups of bits, called blocks, with an unvarying transformation. A block cipher encryption algorithm might take (for example) a 128-bit block of plaintext as input, and output a corresponding 128-bit block of ciphertext. The exact transformation is controlled using a second input — the secret key.
Publishing house:
Betascript Publishing
Website:
https://www.betascript-publishing.com/
Edited by:
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
Number of pages:
104
Published on:
2010-09-06
Stock:
Available
Category:
Informatics
Price:
336.57 HK$
Keywords:
Block Cipher, Feistel Cipher, Blowfish (cipher)

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