Data encryption method and device, data decryption method and device and solid state disk

TL;DR: In this paper, the authors proposed a data encryption method and a device, a data decryption method and device thereof, and a solid state disk, wherein the encryption method comprises the steps of: receiving data to be encrypted and obtaining the position information of the data; receiving an encryption key decrypted by a controller and obtaining a session key used for encrypting the data.

Abstract: The embodiment of the invention provides a data encryption method and a device thereof, a data decryption method and a device thereof, and a solid state disk, wherein the data encryption method comprises the steps of: receiving data to be encrypted and obtaining the position information of the data to be encrypted; receiving an encryption key decrypted by a controller and obtaining a session key used for encrypting the data to be encrypted according to the encryption key after decryption and the position information; and encrypting the data to be encrypted according to the session key. By carrying out predetermined operation on the KEY and the position information of data storage in the encryption process to generate the corresponding session key, the aim of using the corresponding session key to encrypt the data entering and going out of the address can be realized; as each data storage position corresponds to a unique session key, the attacker cannot reversely reckon the KEY even obtaining a certain session key through decryption, thus guaranteeing the confidentiality of data in SSD and improving the data safety.