Mass transmission method and device based on elliptic curve

Abstract

The invention relates to a mass transmission method and device based on an elliptic curve, and the method comprises the steps that S1, a receiver generates a private key d through employing a random algorithm, and generates a public key Q based on an SM2 elliptic curve; S2, a sender constructs multiple pieces of selection information, each piece of selection information comprises an identifier andinformation content, and only an identifier list of the multiple pieces of selection information is sent to the receiver; S3, the receiver selects an identifier from the identifier list, gives an identifier value to the selected identifier, encrypts the selected identifier and the identifier value by using an elliptic curve algorithm to generate an encryption parameter, and sends the encryption parameter to the sender; S4, the sender encrypts all the selection information by using the encryption parameter and the public key Q, and sends the encrypted ciphertext to the receiver; and S5, the receiver decrypts the ciphertext transmitted by the sender by using an elliptic curve algorithm to obtain the information content corresponding to the selected identifier. According to the method, the problems of privacy data protection and the like involved in a blockchain project scene can be solved.

Description

technical field [0001] The present invention relates to the technical field of data decryption, in particular to a dazed transmission method and device based on elliptic curves. Background technique [0002] With the gradual entry of computers and networks into the lives of the masses, various information systems have been widely used. In the field of electronic commerce, how to protect the interests of all parties involved in transactions is becoming increasingly important. Consumers conducting online transactions are required to provide some authentication, most commonly credit card numbers or account names, which can reveal a consumer's identity. Therefore, how to realize the privacy protection of private data has become a concern in the information society. [0003] Oblivious Transfer (Oblivious Transfer OT) is a cryptographic protocol that can protect privacy, also known as Oblivious Transfer Protocol. It enables the parties involved in the agreement to transfer messa...

AI Technical Summary

Problems solved by technology

[0021] d. After the user pays the electronic currency with the price of the corresponding item, he can only get the item he chooses, and knows nothing about the rest of the items

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