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applied cryptography - protocols, algorithms, and source code in c

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Unformatted text preview: that CAST is resistant to linear cryptanalysis. There is no known way to break CAST other than brute force. Northern Telecom is using CAST in their Entrust security software package for Macintoshes, PCs, and UNIX workstations. The particular S-boxes they chose are not public. The Canadian government is evaluating CAST as a new encryption standard. CAST is patent-pending. 14.3 Blowfish Blowfish is an algorithm of my own design, intended for implementation on large microprocessors [1388,1389]. The algorithm is unpatented, and the C code in the back of this book is in the public domain. I designed Blowfish to meet the following design criteria. 1. Fast. Blowfish encrypts data on 32-bit microprocessors at a rate of 26 clock cycles per byte. 2. Compact. Blowfish can run in less than 5K of memory. 3. Simple. Blowfish uses only simple operations: addition, XORs, and table lookups on 32-bit operands. Its design is easy to analyze which makes it resistant to implementation errors [1391]. 4. Variably Secure. Blowfish’s key length is variable and can be as long as 448 bits. Previous Table of Contents Next Products | Contact Us | About Us | Privacy | Ad Info | Home Use of this site is subject to certain Terms & Conditions, Copyright © 1996-2000 EarthWeb Inc. All rights reserved. Reproduction whole or in part in any form or medium without express written permission of EarthWeb is prohibited. Read EarthWeb's privacy statement. To access the contents, click the chapter and section titles. Applied Cryptography, Second Edition: Protocols, Algorthms, and Source Code in C (cloth) Go! Keyword Brief Full Advanced Search Search Tips (Publisher: John Wiley & Sons, Inc.) Author(s): Bruce Schneier ISBN: 0471128457 Publication Date: 01/01/96 Search this book: Go! Previous Table of Contents Next ----------- Blowfish is optimized for applications where the key does not change often, like a communications link or an automatic file encryptor. It is significantly faster than DES when implemented on 32-bit microprocessors with large data caches,...
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