Method for efficiently, parallelly and safely encrypting and decrypting high-capacity data packets

Abstract

The invention discloses a method for efficiently, parallelly and safely encrypting and decrypting high-capacity data packets, comprising the steps as follows: 1, after a server acquires the high-capacity data packets, the data packets are divided into a fixed number of sub-blocks, and all data sub-blocks are decomposed into the data fragments with a fixed volume; 2, each data fragment is encrypted with randomly generated symmetric encryption keys, and the encryption result of the former data fragment is required to be used when the next data fragment is encrypted; 3, after the encryption is finished, all the symmetric encryption keys and first data fragment ciphertext of each data sub-block are stored together (called key data); and ciphertexts beginning from the second data fragment of each data sub-block are stored together (called non-key data); 4, when a client-side requests for the high-capacity data packets, the server issues the non-key data through public channels and the key data through safe channels; and 5, the client-side carries out decryption in accordance with the opposite encryption sequence. The method provided by the invention is high in safety and transmission efficiency.

Description

technical field [0001] The invention belongs to the field of computer application system security, and in particular relates to a high-efficiency parallel security encryption and decryption method for large-capacity data packets. Background technique [0002] Now more and more data needs to be transmitted securely on the network, especially in some distributed encryption and decryption systems, the server needs to do separate encryption for each different client in order to achieve "one secret, one key". As we all know, encryption and decryption are very resource-intensive calculations. If a large number of different clients apply to the server for a large encrypted data package within a relatively short period of time, it will put a huge pressure on the server. [0003] The current popular symmetric encryption algorithm has high efficiency, but because the key needs to be transmitted through the network in the distributed encryption and decryption system, the security is no...

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