Security Under Message-Derived Keys: Signcryption in iMessage
Security Under Message-Derived Keys: Signcryption in iMessage
复制标题
消息派生密钥下的安全性：iMessage 中的签密
DOI：
10.1007/978-3-030-45727-3_17
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Stepanovs, Igors
中科院分区：
文献类型：
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作者：
Bellare, Mihir;Stepanovs, Igors
At the core of Apple’s iMessage is a signcryption scheme that involves symmetric encryption of a message under a key that is derived from the message itself. This motivates us to formalize a primitive we call Encryption under Message-Derived Keys (EMDK). We prove security of the EMDK scheme underlying iMessage. We use this to prove security of the signcryption scheme itself, with respect to definitions of signcryption we give that enhance prior ones to cover issues peculiar to messaging protocols. Our provable-security results are quantitative, and we discuss the practical implications for iMessage.
