Key protection method and device

Abstract

The embodiment of the invention provides a secret key protection method and device. The method comprises the steps: carrying out the Hash calculation of the node-to-node corresponding user name, public key, time stamp and random number in a peer-to-peer network, and obtaining a Hash value; at least transmitting the user name, the public key, the time stamp and the Hash value to other nodes in the peer-to-peer network when the Hash value is less than a threshold value. According to the embodiment of the invention, the method achieves the Hash calculation of the node-to-node corresponding user name, public key, time stamp and random number in the peer-to-peer network, and obtains the Hash value. At least transmitting the user name, the public key, the time stamp and the Hash value are transmitted to other nodes in the peer-to-peer network when the Hash value is less than the threshold value, so as to enable other nodes to receive the user name and public key of the node. Can a malicious node recalculate another Hash value less than the threshold value only through its own public key, or else any change can cause the Hash calculation failure, and can be found by other nodes in the P2P network, thereby improving the safety of secret key protection.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular, to a key protection method and device. Background technique [0002] The public key (Public Key) and the private key (Private Key) are a key pair obtained through an algorithm (that is, a public key and a private key). The public key is the public part of the key pair, and the private key is the non-public key. public part. Public keys are often used to encrypt session keys, verify digital signatures, or encrypt data that can be decrypted with the corresponding private key. The key pair obtained by this algorithm can be guaranteed to be unique in the world. When using this key pair, if a piece of data is encrypted with one key, it must be decrypted with the other key. For example, if you encrypt data with the public key, you must use the private key to decrypt it. If you use the private key to encrypt data, you must also use the public key to...

AI Technical Summary

Problems solved by technology

[0004] If the adjacent node of the user terminal is a malicious node or the user terminal is replaced by a malicious node, the malicious node will modify the user name + public key + time stamp of the user terminal, and will modify the user name + public key + When the time stamp is released to the network, the user name + public key + time stamp of the user terminal recorded by all nodes in the network may be inconsistent, resulting in conflicts

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