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

If the hidden coin is different from the two coins

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Unformatted text preview: s can be computed by a set of n players in a way that will let all learn the value of the function, but any set of less than n/2 players will not get any additional information that does not follow from their own inputs and the value of the output information. For details, see [136, 334, 1288, 621]. Secure Circuit Evaluation Alice has her input, a. Bob has his input, b. Together they wish to compute some general function, f (a,b), such that Alice learns nothing about Bob’s input and Bob learns nothing about Alice’s input. The general problem of secure multiparty computation is also called secure circuit evaluation. Here, Alice and Bob can create an arbitrary Boolean circuit. This circuit accepts inputs from Alice and from Bob and produces an output. Secure circuit evaluation is a protocol that accomplishes three things: 1. Alice can enter her input without Bob’s being able to learn it. 2. Bob can enter his input without Alice’s being able to learn it. 3. Both Alice and Bob can calculate the output, with both parties being sure the output is correct and that neither party has tampered with it. Details on secure circuit evaluation can be found in [831]. 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 ----------- 6.3 Anonymous Message Broadcast You can’t go out to dinner with a bunch of cryptographers without raising a ruckus. In [321], David Chaum introduced the Dining Cryptographers Problem: Three cryptographers are sitting down to dinner at their favorite three-star restaura...
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