A key acquisition method and system

Abstract

The embodiment of the present application provides a key obtaining method and system. Wherein, the method applied to the first device specifically includes: receiving the first encrypted string sent by the second device, where the first encrypted string is: the encrypted string obtained after the second device encrypts the first key with the second key; The first key and the second key are keys determined by the second device; determine the third key, and encrypt the first encrypted string with the third key, obtain the second encrypted string, and send the second encrypted string To the second device; receiving the first information string sent by the second device, the first information string is: the information string obtained after the second device decrypts the second encrypted string with the second key; The key decrypts the first information string to obtain a second information string, and uses the second information string as a fourth key for the first device to encrypt and decrypt data. Applying the solution provided by the embodiment of the present application can improve the security of data in the communication process.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular, to a method and system for obtaining a key. Background technique [0002] In a communication network, when sending data between device 1 and device 2, the data to be sent is often encrypted to improve the security of the device communication process. After the data is encrypted, even if a malicious eavesdropper intercepts the encrypted data, it is not easy to decrypt the original data from the encrypted data. [0003] In the prior art, when encrypting data, device 1 usually encrypts the data by using an encryption algorithm pre-agreed with device 2 , and sends the encrypted data to device 2 . After receiving the encrypted data sent by the device 1, the device 2 uses a decryption algorithm corresponding to the above encryption algorithm to decrypt the data to obtain the original data. Among them, when encrypting and decrypting data, it is necessary to use th...

AI Technical Summary

Problems solved by technology

However, once the person who knows the key leaks the key and is obtained by a malicious eavesdropper, the data encrypted by the above data encryption method may be deciphered by a malicious eavesdropper, so the security of the data in the communication process is not high

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