Key generation method and device, computer device and storage medium

Abstract

The invention relates to a key generation method and device, a computer device and a storage medium. The method comprises the steps of obtaining an ID of a logic block address; obtaining a product serial number and a key length of the solid state disk; And performing key derivation processing by using the ID of the logic block address, the product serial number and the length to obtain a key. According to the invention, the serial number of the product is identified. Through performing key derivation processing on the set key length and the ID of the logical block address in the meta-information header, processing is carried out by adopting a splicing algorithm and a national cryptography SM3 algorithm. Key table does not need to be manually filled in. According to the method, the used AESsecret keys are determined according to the ID of the logical block addresses, the product serial number and the set secret key length are combined, it can be avoided that a plurality of logical block addresses use one set of secret keys, the data insecurity situation caused by cracking of secret key table information is avoided, and the correlation and the primitiveness between all sets of AES secret keys can be reduced.

Description

technical field [0001] The present invention relates to a solid-state hard disk, and more specifically refers to a key generation method, device, computer equipment and storage medium. Background technique [0002] Most of the encryption standards used by SSDs for data are Advanced Encryption Standards to ensure data security. The current AES (Advanced Encryption Standard, Advanced Encryption Standard) key is manually written into the key table through software, and manually updated and updated. Managed keys and key tables. The use process of the AES key is as follows figure 1 As shown, there are 32 sets of keys in the key table that need to be filled in manually, and one set of keys is used for every 8 logical block addresses. The AES key acquisition and use process is as follows: When the data needs to be encrypted and decrypted by AES, the ID field of the smallest mapping unit in the meta-information header is used to calculate the ID of the corresponding logical block ...

AI Technical Summary

Problems solved by technology

[0003] In the above method, there is a hidden danger of key information being insecure by manually filling in the key table through software, and the AES key used is determined by the ID of the logical block address, and there are multiple logical block addresses using one The group key cannot fail to guarantee the security of the data in each logical block address. At the same time, the correlation and cardinality between the manually filled AES keys are relatively high, resulting in low data security.

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