Key generation method, device, computer equipment and storage medium

Abstract

The present invention relates to a key generation method, device, computer equipment and storage medium. The method includes obtaining the ID of the logical block address; obtaining the product serial number and key length of the solid-state hard disk; using the ID of the logical block address and the product serial number and the length for key derivation processing to obtain the key. In the present invention, the key derivation process is performed on the product serial number, the set key length, and the ID of the logical block address in the meta-information header, and the process is performed by splicing and the national secret SM3 algorithm, without manually filling in the key table, not only by The ID of the logical block address determines the AES key used, combined with the product serial number and the set key length, it can avoid multiple logical block addresses using a set of keys, and avoid the cracking of the key table information. Data insecurity can also reduce the correlation and primacy between each group of AES keys.

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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