Data fragmentation secure transmission method and device based on pseudo-random number

Abstract

The invention provides a data fragmentation secure transmission method and device based on a pseudo random number, a computer storage medium and electronic equipment. The method comprises the following steps that: a data sender and a data receiver negotiate a key and a random seed; the data sender groups and encrypts plaintext data to be sent according to the secret key to obtain a plurality of ciphertext groups, generates a unique corresponding random serial number for each ciphertext group according to the random seed, sorts the ciphertext groups according to a certain rule and sends the sorted ciphertext groups to the data receiver; and the data receiver receives the ciphertext groups, generates a random serial number list according to the random seeds, rearranges the plurality of ciphertext groups according to the random serial number list, and decrypts the plurality of ciphertext groups according to the key to obtain plaintext data. According to the method, the sequence of the ciphertext groups is randomly scattered before the data is sent, and because the correct sequence of the plaintext groups is unknown, an attacker cannot obtain correct data information even if the attacker cracks a secret key, so that the confidentiality of the data is enhanced.

Description

technical field

[0001] The invention relates to the technical field of information security, in particular to a method and device for safely transmitting data fragmentation based on pseudo-random numbers. Background technique

[0002] With the rapid development of the Internet and communication technology, the transmission of data information has become more and more convenient, and at the same time, the security of sensitive information has become more and more important.

[0003] With the gradual improvement of computer performance, especially the emergence of quantum computers, the difficulty of cracking traditional block encryption algorithms has gradually decreased. It is difficult to guarantee the confidentiality of data simply by using block encryption algorithm to encrypt data. For the ciphertext packets sent sequentially, the attacker can obtain a large amount of ciphertext data by eavesdropping on the communication channel, and after cracking the key through brute...

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