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arXiv 1705.03430cs.ITmath.IT
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无密钥和基于密钥的身份认证方案分析

Analysis of Channel-Based User Authentication by Key-Less and Key-Based Approaches

Stefano Tomasin

摘要:

用户身份验证(UA)支持接收方决定消息是来自声称的发送方还是来自假冒的攻击者。在加密方法中,消息使用非对称或对称密钥签名,并且需要随机性源来生成密钥。在物理层认证(PLA)中,接收方检查接收到的消息是否来自同一个源,是否经过同一个通道。我们通过将物理层通道特征视为生成密钥的随机性源来比较这些解决方案,从而可以立即与PLA(已经使用这些特征)进行比较。对于密钥方法,我们使用秘密密钥协议,而对于非对称密钥,信道被用作发送端的熵源。我们专注于一个无限数量的独立和相同分布的信道实现的渐近情况下,显示所有方案的正确性和分析的安全认证率,这表明率,UA安全被打破的概率为零,所使用的信道资源(生成的密钥或PLA)的数量趋于无穷大。被动和主动攻击被认为是和数值结果,我们比较各种系统。

英文摘要:

User authentication (UA) supports the receiver in deciding whether a message comes from the claimed transmitter or from an impersonating attacker. In cryptographic approaches messages are signed with either an asymmetric or symmetric key, and a source of randomness is required to generate the key. In physical layer authentication (PLA) instead the receiver checks if received messages presumably coming from the same source undergo the same channel. We compare these solutions by considering the physical-layer channel features as randomness source for generating the key, thus allowing an immediate comparison with PLA (that already uses these features). For the symmetric-key approach we use secret key agreement, while for asymmetric-key the channel is used as entropy source at the transmitter. We focus on the asymptotic case of an infinite number of independent and identically distributed channel realizations, showing the correctness of all schemes and analyzing the secure authentication rate, that dictates the rate at which the probability that UA security is broken goes to zero as the number of used channel resources (to generate the key or for PLA) goes to infinity. Both passive and active attacks are considered and by numerical results we compare the various systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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