Chained data encryption method, chained data decryption method and corresponding systems

Abstract

The invention provides a chained data encryption method, a chained data decryption method and corresponding systems, and the chained data encryption method comprises the steps: obtaining to-be-encrypted data, and splitting the to-be-encrypted data into a plurality of data packets; generating an initial random symmetric key corresponding to each data packet; utilizing a public key of a receiver andthe initial random symmetric secret key to respectively carry out chain type data encryption on each data packet; and combining the digital signature of the sender and each encrypted data packet which is encrypted, and sending the combined data packet to a receiver. According to the scheme, in encryption and decryption operation of large-scale data, the processing efficiency can be greatly improved; on the premise that the system processing amount is not increased, the encryption effect is obviously enhanced, meanwhile, under the condition that an abstract algorithm is not increased, the datahas tamper resistance, multiple different encryption algorithms in a cloud platform can be effectively compatible, and the transformation cost is low.

Description

technical field [0001] The invention relates to the technical field of information security in computer technology, in particular to a chain data encryption method, a chain data decryption method and a corresponding system. Background technique [0002] In the prior art, big data encryption usually uses a single host to complete the encryption of big data or use digital envelope technology for encryption; among them, there are some obvious disadvantages in the way of single host to complete the big data encryption, for example, the execution efficiency is very low, and the execution efficiency of big data is very low. Digest algorithms are very inefficient and often fail to verify data integrity. [0003] Because the digital envelope technology takes into account the characteristics of high efficiency of symmetric encryption and strong security of asymmetric encryption, it plays an important role in today's data processing. However, the digital envelope encryption technolog...

AI Technical Summary

Problems solved by technology

If the SM3 digest algorithm is not used, data integrity cannot be guaranteed, and there is no effective way to ensure data integrity at the splicing point. It can be seen that this method has great limitations. For example, in the case of a large amount of data, use Digital Envelope Encryption Efficiency Still Unsatisfactory

When the amount of data reaches several G, the encryption and decryption process of the general system will be very long; if the strategy of splitting and parallel processing is adopted for the data, it is difficult to ensure the integrity of the data; using the SM3 hash algorithm to generate a digest can ensure the integrity , but it will increase the amount of calculation; in some important occasions, the encryption strength is still insufficient

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