DISTRIBUTED DATA ENCRYPTION METHOD, DEVICE, CLOUD STORAGE SERVER, AND STORAGE MEDIUM

摘要

A distributed data encryption method, a device, a cloud storage server, and a storage medium, pertaining to the technical fields of cloud storage and big data. The method comprises: acquiring data to be encrypted and an encryption key; slicing the data to obtain multiple data slices; distributing the encryption key and the multiple data slices to multiple encryption devices; receiving multiple pieces of first slice ciphertext reported by the multiple encryption devices after the devices have encrypted the data slices using the encryption key; distributing the multiple pieces of the first slice ciphertext to the multiple encryption devices in an interleaving manner; receiving pieces of second slice ciphertext reported by the multiple encryption devices after the devices have encrypted the first slice ciphertext using a new encryption key, wherein the new encryption key has been obtained by the encryption devices after performing re-encryption on the encryption key; and storing the second slice ciphertext. The invention performs slicing and encryption on data to be stored, and performs secondary encryption in an interleaving manner, thereby improving the speed and efficiency of encrypting a large amount of data, and guaranteeing data security.