Encryption key generation and encryption method, decryption key generation and decryption method

Abstract

The invention discloses an encryption key generation method, an encryption method, a decryption key generation method and a decryption method. The encryption key generation method comprises the following steps: acquiring a first key factor; setting a first fixed key, wherein the first fixed key is preset and stored in the encryption equipment; negotiating a first dynamic key, and negotiating between the encryption equipment and the decryption equipment by the first key negotiation method according to the first configuration parameter to obtain the first dynamic key; performing first logical operation on the first key factor, the first fixed key and the first dynamic key to obtain a first encryption key; and performing hash operation on the first encryption key to obtain a second encryptionkey, wherein the second encryption key is used for encrypting data. According to the encryption key generation method provided by the invention, one-packet-one-key are realized, the complexity of theencryption key is high, the security of data transmission is improved, the cracking difficulty is improved, the generated encryption key does not need to be repeatedly set in the data transmission, and the network data transmission performance is ensured.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an encryption key generation and an encryption method thereof, a decryption key generation and a decryption method thereof. Background technique [0002] Data encryption can be seen everywhere. Common symmetric encryption or asymmetric encryption use fixed keys or regularly updated keys. Regardless of whether fixed keys or regularly updated keys are used, there are cases where a large number of data packets use the same key. Hackers only need to attack and crack one packet of data to obtain the passwords of a large number of packets. In order to increase data security, we can only continuously increase the complexity of the encryption algorithm and increase the difficulty of cracking. But any algorithm has the possibility of being cracked, so to increase data security, in addition to increasing the complexity of the algorithm, the time cost and economic cost of...

AI Technical Summary

Problems solved by technology

In order to increase data security, we can only continuously increase the complexity of the encryption algorithm and increase the difficulty of cracking

But any algorithm has the possibility of being cracked, so to increase data security, in addition to increasing the complexity of the algorithm, the time cost and economic cost of cracking should also be increased. When the cost of cracking is much greater than the benefits after cracking, it is meaningless for data cracking

[0003] The traditional implementation of one packet one encryption is to negotiate a key before each data transmission. This scheme can be used in the case of low-speed small amount of data transmission, but for a large number of high-speed data packets, negotiating the key every time will seriously affect the transmission performance.

Images