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

The costs impacts and benefits of these alternatives

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Unformatted text preview: ll unclassified government communications. The official description of the standard, FIPS PUB 46, “Data Encryption Standard,” was published on January 15, 1977 and became effective six months later [1140]. FIPS PUB 81, “DES Modes of Operation,” was published in 1980 [1143]. FIPS PUB 74, “Guidelines for Implementing and Using the NBS Data Encryption Standard,” was published in 1981 [1142]. NBS also published FIPS PUB 112, specifying DES for password encryption [1144], and FIPS PUB 113, specifying DES for computer data authentication [1145]. (FIPS stands for Federal Information Processing Standard.) These standards were unprecedented. Never before had an NSA-evaluated algorithm been made public. This was probably the result of a misunderstanding between NSA and NBS. The NSA thought DES was hardware-only. The standard mandated a hardware implementation, but NBS published enough details so that people could write DES software. Off the record, NSA has characterized DES as one of their biggest mistakes. If they knew the details would be released so that people could write software, they would never have agreed to it. DES did more to galvanize the field of cryptanalysis than anything else. Now there was an algorithm to study: one that the NSA said was secure. It is no accident that the next government standard algorithm, Skipjack (see Section 13.12), was classified. 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...
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This note was uploaded on 10/18/2010 for the course MATH CS 301 taught by Professor Aliulger during the Fall '10 term at Koç University.

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