Computer Security — ESORICS 2002: 7th European Symposium on by Michael Backes, Birgit Pfitzmann (auth.), Dieter Gollmann,

By Michael Backes, Birgit Pfitzmann (auth.), Dieter Gollmann, Günther Karjoth, Michael Waidner (eds.)

ESORICS, the eu Symposium on learn in machine defense, is the major research-oriented convention at the thought and perform of machine safety in Europe. It occurs each years, at a number of destinations all through Europe, and is coordinated through an self sustaining guidance Committee. ESORICS 2002 was once together equipped by way of the Swiss Federal Institute of Te- nology (ETH) and the IBM Zurich study Laboratory, and happened in Zurich, Switzerland, October 14-16, 2002. this system committee bought eighty three submissions, originating from 22 co- attempts. For fanatics of records: fifty five submissions got here from nations in Europe, the center East, or Africa, sixteen got here from Asia, and 12from North the US. The best nations have been united states (11 submissions), Germany (9), France (7), Italy (7), Japan (6), and united kingdom (6). every one submission used to be reviewed by means of at the very least 3 p- gram committee individuals or different specialists. each one submission coauthored through a software committee member acquired extra stories. this system c- mittee chair and cochair weren't allowed to post papers. The ?nal choice of papers was once made at a application committee assembly and ended in sixteen approved papers. compared, ESORICS 2000 acquired seventy five submissions and approved 19 of them. this system re?ects the total variety of protection study: we permitted papers on entry keep an eye on, authentication, cryptography, database safeguard, formal equipment, intrusion detection, cellular code safety, privateness, safe undefined, and safe protocols. We gratefully recognize all authors who submitted papers for his or her e?orts in protecting the criteria of this conference.

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Additional resources for Computer Security — ESORICS 2002: 7th European Symposium on Research in Computer Security Zurich, Switzerland, October 14–16, 2002 Proceedings

Example text

For example, an AND computation requires 8 plaintext equality tests and a MIX protocol of four items if we implement the protocol of Sec. 5. Hence mk AND computations requires 8mk plaintext equality tests and mk MIX protocols of four items. This is much larger than the cost of k plaintext equality tests. Now roughly speaking, our protocol requires mk logical gates while JJ auction protocol requires 7mk logical gates and m Selectk circuit. Therefore, our protocol is at least seven times faster than JJ auction protocol.

Juels, “Mix and Match: Secure Function Evaluation via Ciphertexts,” In Proc. of Asiacrypt 2000, LNCS Vol. 1976, pp. 162–177 (2000). 25, 26, 31, 33, 35 [21] A. Juels and M. Szydlo, “An Two-Server Auction Protocol,” In Proc. of Financial Cryptography 2002, (2002). 25 [22] M. Naor, B. Pinkas, and R. Sumner, “Privacy preserving auctions and mechanism design,” In 1st ACM Conference on Electronic Commerce, pp. 129–140, ACM (1999). 25, 26 [23] K. Sako, “An auction protocol which hides bids of losers,” Proc.

He may also tell a lie about the highest price and the winners. Hence we need a cryptographically secure auction protocol which satisfies privacy and correctness. The correctness means that the announced highest price and the identities of the winners are guaranteed to be correct. The privacy means that no adversary can compute any other information. In principle, it is known that any function can be computed securely by using general multiparty protocols [25, 16, 5, 9, 17]. ) A problem is, however, that the cost of each bidder is very large in their general forms.

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