Safe data deletion method based on solid-state disk array

Abstract

The invention discloses a safe data deletion method based on a solid-state disk array. Based on the parallel operation of multiple solid state disks in the solid state disk array, the secret sharing algorithm is used to convert the data and distribute the encoded data to each solid state disk. On one hand, the encoding guarantees the data redundancy and the converted data is ciphertext, which improves the reliability and security of the data. On the other hand, by using the characteristic of fault-tolerant coding, the deletion of data does not need to overwrite the whole data, but deletes partof the data, destroys the integrity of the data and makes the data can not be recovered. Even if the attacker gets part of the encoded data, it can not get the plaintext to achieve the purpose of safely detecting the data. The invention solves the safety problems of data storage such as unreliable storage of the solid-state disk array and unsafe deletion of files.

Description

technical field [0001] The invention belongs to the technical field of computer data storage, and more particularly relates to a method for safely deleting data based on a solid-state disk array. Background technique [0002] Currently, flash-based solid-state drives (SSDs) have emerged as a powerful alternative to magnetic disks and have received extensive attention from both academia and industry. In addition to being used in desktop computers, SSDs are gradually being used in servers and enterprise-level data storage systems. In an enterprise-level data storage system, a single solid-state disk obviously cannot meet the service's requirements for storage system capacity, performance, and reliability. Therefore, it is very necessary to apply the disk array (RAID) algorithm to the solid-state disk storage system to construct a large-capacity, high-performance and highly reliable storage system, that is, a solid-state disk array. Similar to RAID, the performance of an SSD ...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention proposes a data security deletion method based on a solid state disk array, which introduces the basic principle of the secret sharing mechanism into it, and destroys the data redundancy capability of each solid state disk in the solid state disk array , combined with the data conversion processing operation, after the integrity of the data is destroyed, the remaining data is encrypted, even if the attacker obtains part of the encoded data, the plaintext cannot be obtained, so as to achieve the purpose of safely deleting the data, which can effectively solve the problem in the prior art Due to the off-site update feature of the solid-state disk, the data cannot be safely deleted, the data storage security of the solid-state disk array, and a large number of overwrites affect the life of the flash memory and wear balance.

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