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    题名: ID-based group password-authenticated key exchange
    作者: Yi, X.;Tso, Ray Lin
    左瑞麟
    贡献者: 資訊科學系
    关键词: Active adversary;Client needs;Group key;Group key agreement;Group key exchange;ID-based;Identity based encryption;Identity based signature;Password-authenticated key exchange;Private key;protocol compiler;Provable security;Reference models;Secret key;Without random oracles;Authentication;Cryptography;Models;Network protocols;Program compilers;Security systems;Network security
    日期: 2009
    上传时间: 2015-10-19 14:57:46 (UTC+8)
    摘要: Password-authenticated key exchange (PAKE) protocols are designed to be secure even when the secret key used for authentication is a human-memorable password. In this paper, we consider PAKE protocols in the group scenario, in which a group of clients, each of them shares his password with an "honest but curious" server, intend to establish a common secret key (i.e., a group key) with the help of the server. In this setting, the key established is known to the clients only and no one else, including the server. Each client needs to remember the password only while the server keeps passwords in addition to private keys related to its identity. Towards our goal, we present a compiler that transforms any group key exchange (KE) protocol which is secure against a passive eavesdropping to a group PAKE which is secure against an active adversary who controls all communications in the network. This compiler is built on a group KE protocol, an identity-based encryption (IBE) scheme, and an identity-based signature (IBS) scheme. It adds only two rounds and O(1) communication (per client) to the original group KE protocol. As long as the underlying group KE protocol, IBE scheme and an IBS scheme have provable security without random oracles, the group PAKE constructed by our compiler can be proven to be secure without random oracles. © 2009 Springer-Verlag Berlin Heidelberg.
    關聯: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics),5824 LNCS192-211
    数据类型: article
    DOI 連結: http://dx.doi.org/10.1007/978-3-642-04846-3_13
    DOI: 10.1007/978-3-642-04846-3_13
    显示于类别:[資訊科學系] 期刊論文

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