Information Leakage Measurement in a Distributed Computation Protocol

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概要

• 論文の詳細を見る

• This paper deals with the information leakage measurement in a distributed computation protocol called SASC. The SASC protocol is a kind of two-party protocol between a client and a server. The computation for RSA cryptosystem is the target of this paper. This paper shows that a secure RSA-SASC protocol proposed recently could be changed to be insecure if the client which has secret information were to complain about the computation result. This paper first clarifies how to measure the information amount which leaks through the protocol. It, then, shows an attack procedure to make use of the client's complaint. Effectiveness of the attack procedure is measured by the information theoretic measure. By using the same measure, it is shown that some attacks do not work to derive the client's secret. It is also shown that a practical countermeasure to limit the number of incorrect computation allowed is effective to limit the leakage of the secret information to some reasonable extent.

• 社団法人電子情報通信学会の論文
• 1995-01-25

著者

• Kawamura S

  Toshiba Corp. Kawasaki‐shi Jpn

• Kawamura Shin-ichi

  Research And Development Center Toshiba Corporation

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• Information Leakage Measurement in a Distributed Computation Protocol

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