JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.4 P.511-521

http://doi.org/10.1631/jzus.2007.A0511

On ASGS framework: general requirements and an example of implementation

Author(s): KULESZA Kamil, KOTULSKI Zbigniew
Affiliation(s): Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, UK; more
Corresponding email(s): K.Kulesza@damtp.cam.ac.uk, Zbigniew.Kotulski@ippt.gov.pl
Key Words: Secret sharing, Security protocols, Dependable systems, Authentication management

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Abstract: In the paper we propose a general, abstract framework for Automatic Secret Generation and Sharing (ASGS) that should be independent of underlying secret sharing Scheme (SSS). ASGS allows to prevent the Dealer from knowing the secret. The Basic Property Conjecture (BPC) forms the base of the framework. Due to the level of abstraction, results are portable into the realm of quantum computing. Two situations are discussed. First concerns simultaneous generation and sharing of the random, prior nonexistent secret. Such a secret remains unknown until it is reconstructed. Next, we propose the framework for automatic sharing of a known secret. In this case the Dealer does not know the secret and the secret Owner does not know the shares. We present opportunities for joining ASGS with other extended capabilities, with special emphasis on PVSS and pre-positioned secret sharing. Finally, we illustrate framework with practical implementation.

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