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

You can do the same with the dsa like schemes r mgk

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Unformatted text preview: piece of the private key with each signature, it is important to never use an implementation of DSS if you don’t trust the implementer. 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 ----------- Patents David Kravitz, formerly of the NSA, holds a patent on DSA [897]. According to NIST [538]: NIST intends to make this DSS technique available world-wide on a royalty-free basis to the public interest. We believe this technique is patentable and that no other patents would apply to the DSS, but we cannot give firm assurances to such effect in advance of issuance of the patent. Even so, three patent holders claim that the DSA infringes on their patents: Diffie-Hellman (see Section 22.1) [718], Merkle-Hellman (see Section 19.2) [720], and Schnorr (see Section 21.3) [1398]. The Schnorr patent is the most troublesome. The other two patents expire in 1997; the Schnorr patent is valid until 2008. The Schnorr algorithm was not developed with government money; unlike the PKP patents, the U.S. government has no rights to the Schnorr patent; and Schnorr patented his algorithm worldwide. Even if the U.S. courts rule in favor of DSA, it is unclear what other courts around the world would do. Is an international company going to adopt a standard that may be legal in some countries but infringes on a patent in others? This...
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