A Mode of Operation with Partial Encryption and Message Integrity
A Mode of Operation with Partial Encryption and Message Integrity
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发表时间：
2003
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通讯作者：
P. Hawkes;Gregory G. Rose
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作者：
P. Hawkes;Gregory G. Rose
在最近的AES操作模式会议上，提出了几种使用分组密码同时提供机密性和身份验证的操作模式。这些模式只需要比单独的加密成本多一点的工作，并且带有安全性证明。然而，这些模式要求以加密形式发送整个消息。这可能会在某些情况下导致问题，其中一些消息需要以明文形式发送，同时仍然需要进行身份验证。本文描述了一种简单的变体，允许任何选择的消息块以明文形式发送，而不是以加密形式发送。这种带有消息完整性的部分加密（PEMI）模式对于消息完整性和消息保密性来说是安全的。
At the recent AES Modes of Operation Conference, several modes of operation were proposed for using a block cipher to provide both con dentiality and authentication. These modes require only a little more work than the cost of encryption alone, and come with proofs of security. However, these modes require the entire message to be sent in encrypted form. This can cause problems in situations where some of the message neeeds to be sent in plaintext while still being authenticated. This paper describes a simple variation that allows any choice of message blocks to be sent in plaintext form rather than in encrypted form. This mode, Partial Encryption with Message Integrity (PEMI), is shown to be secure for message integrity and message secrecy.