Safe data storage and transmission method

Abstract

The invention discloses a safe data storage and transmission method. The safe data storage and transmission method comprises a data sender, a data receiver and a third party capable of communicating with the data sender and data receiver. The safe data storage and transmission method includes steps that A, the third party generates a symmetric key cache, encrypts and sends to the data sender; B, the data sender decodes the encrypted symmetric key, uses the decoded symmetric key to encrypt data to be transmitted, and transmits the encrypted data and a data receiver list to the third party; C, the third party uses a public key of each receiver to carry out conversion encryption treatment on the cached symmetric key according to the data receiver list and deletes the symmetric key; D, each data receiver receives the corresponding symmetric key performed with conversion encryption and the encrypted data from the third part, uses a private key thereof to decode the symmetric key performed with conversion encryption, and uses the decoded symmetric key to decode the encrypted data. The safe data storage and transmission method improves the data transmission efficiency and guarantees the data storage safety in the third party.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a method for safely storing and transmitting data. Background technique [0002] The current secure transmission and storage of data generally adopts digital envelope technology, which uses symmetric key encryption for data and uses public key to encrypt symmetric key. The symmetric key means that both parties sending and receiving data must use the same key to perform encryption and decryption operations on plaintext. [0003] In the case of point-to-point transmission, the sender generates a symmetric key to encrypt the data, then uses the public key of the other party to encrypt the symmetric key, and then sends the encrypted symmetric key and encrypted data to the receiver, and the receiver uses Your own private key decrypts the symmetric key, and you can then decrypt the data into plaintext. [0004] If it is a one-to-many transmission, that is, there are mult...

AI Technical Summary

Problems solved by technology

The above solution solves the efficiency problem of the first solution, but at the same time brings another security problem, that is, if someone breaks the third party, all the data stored by the third party can be obtained and decrypted

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