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Cryptographic method for securely exchanging messages and device and system for implementing this method
Cryptographic method for securely exchanging messages and device and system for implementing this method
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机译:用于安全地交换消息的密码方法以及用于实现该方法的设备和系统
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摘要
At least one embodiment refers to a method for securely exchanging messages between at least two devices, each of them storing a shared secret key. The method comprises: at each device: generating a random number, then sending it to the other devices; determining a first key by a first operation based onto said secret key and each random number; determining a second key based on said first key and said random numbers; at a sending device: determining a pseudo message on the basis of the message and said random numbers; calculating then sending a cryptogram on the basis of said pseudo message and said second key; and at the receiving device: decrypting said cryptogram by means of said second key; and retrieving said message from said pseudo message.
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