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发明公开
CN104488219A 用于在射频识别标签和读取设备之间进行安全通信的方法和系统 有权 转让

用于在射频识别标签和读取设备之间进行安全通信的方法和系统
摘要：
本发明涉及一种用于在RFID标签和读取设备之间经过空气接口进行安全通信的方法和系统以及相应的RFID标签和相应的读取设备。本发明从如下基本思路出发，即，为了在RFID标签和读取设备之间进行安全通信，使用Rabin方法的修改，其中在对明文M(RFID标签的或与之关联的对象的识别元素进入所述明文中)加密的范围内，RFID标签不是计算明文M的平方模n，即，M2 mod n，而是计算明文M的平方关于蒙哥马利基数R模n的蒙哥马利缩减(“Montgomery reduction”)，即，C*＝M2 R-1 mod n，并且从中得到的密文C*被用于验证RFID标签。在此模数n＝p·q是读取设备的公钥，其中质数p、q是读取设备的私钥并且蒙哥马利基数R是大于模数n的整数。
摘要（英）：

The invention relates to methods and a system for secure communication between an RFID tag and a reader via the air interface and to corresponding RFID tags and corresponding readers. The invention is based on the fundamental idea that, for the purpose of secure communication between an RFID tag and a reader, a modification of Rabin's method is used, in which, within the scope of encrypting plain text M, which includes an identification element of the RFID tag or of an object provided with the latter, the Montgomery residual ('Montgomery reduction') of the square of the plain text M modulo n with respect to a Montgomery base R, that is to say C* = Mu2 R-1mod n, is calculated from the RFID tag instead of the square of the plain text M modulo n, that is to say M2 mod n, and the resultant ciphertext C* is used to authenticate the RFID tag. In this case the modulus n = p.q is the public key of the reader, the prime numbers p, q are the private key of the reader and the Montgomery base R is an integer greater than the modulus n.

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