An efficient protocol for secure multicast key distribution in the presence of adaptive adversaries一种快速有效能抵抗自适应攻击的组播密钥分发协议

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作者
Huafei Zhu
机构
[1] Zhejiang University City College,School of Computer and Computing Science
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关键词
adaptive adversary; multicast key distribution; pseudo-random number generator; semantic security; symmetric-key encryption; 自适应攻击; 组播密钥分发; 伪随机数发生器; 语义安全; 对称密钥加密算法;
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摘要
In this paper, an efficient construction of multicast key distribution schemes based on semantically secure symmetric-key encryption schemes and cryptographically strong pseudo-random number generators is presented and analyzed. The proposed scheme is provably secure against adaptive adversaries leveraging the security amplification technique defined over the logical key hierarchy structures. Our protocol tolerates any coalition of revoked users; in particular, we do not assume any limit on the size or structure of the coalition. The proposed scheme is efficient as a performance of Join or Leave procedure requires 2 log(N) multicast activities defined over a sibling ancestor node set, 2 log(N) internal state updates of the underlying pseudo-random number generator and 2 log(N) symmetric-key encryption activities for N users in a session.
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