| 摘要 |
<p>A data encryption and decryption method and device are provided, which relate to the technical field of data encryption and decryption. The data encryption method comprises the following steps: grouping plaintext to be encrypted; distributing an encryption function and an encryption key randomly for each group of plaintext data; encrypting each group of the plaintext data respectively with the encryption function and the encryption key; and arranging the encrypted data to form ciphertext according to the position of its corresponding plaintext. The data encryption device comprises a grouping module, a random distribution module for encryption functions and encryption keys, and an encryption processing module. A data decryption method and device are also provided. By distributing the encryption function and encryption key randomly for each bit of the plaintext data to be encrypted when carrying out the encryption, encrypting each bit of the plaintext data and arranging the encrypted data to form the ciphertext, the solution greatly improves the security of data storage and realizes the perfect encryption of data.</p> |
