Secure two-party computation is practical. (English) Zbl 1267.94091

Matsui, Mitsuru (ed.), Advances in cryptology – ASIACRYPT 2009. 15th international conference on the theory and application of cryptology and information security, Tokyo, Japan, December 6–10, 2009. Proceedings. Berlin: Springer (ISBN 978-3-642-10365-0/pbk). Lecture Notes in Computer Science 5912, 250-267 (2009).
Summary: Secure multi-party computation has been considered by the cryptographic community for a number of years. Until recently it has been a purely theoretical area, with few implementations with which to test various ideas. This has led to a number of optimisations being proposed which are quite restricted in their application. In this paper we describe an implementation of the two-party case, using Yao’s garbled circuits, and present various algorithmic protocol improvements. These optimisations are analysed both theoretically and empirically, using experiments of various adversarial situations. Our experimental data is provided for reasonably large circuits, including one which performs an AES encryption, a problem which we discuss in the context of various possible applications.
For the entire collection see [Zbl 1177.94014].


94A60 Cryptography
94A62 Authentication, digital signatures and secret sharing
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