Tamper-proofing timing data secret transmission method based on block chain smart contract

Abstract

The invention relates to the technical field of block chains, and discloses a tamper-proofing timing data secret transmission method based on a block chain smart contract, which comprises the following steps that: a man-in-the-middle generates a public key and a private key pair (PubKey, PrivKey), so that a sender S performs secondary encryption on a transmitted ciphertext fragment through the public key PubKey and sends the ciphertext fragment to the man-in-the-middle at the Ts moment; the man-in-the-middle receives the ciphertext fragment which is sent by the sender S at the Ts moment and isencrypted for the second time through the public key PubKey and performs decrypting at the moment close to the Tr moment to obtain an original ciphertext fragment, and transmits the original ciphertext fragment to a receiver R at the Tr moment, so that the receiver R judges whether the original ciphertext fragment received from a man-in-the-middle is tampered or not, and if the original ciphertext fragment is tampered, the man-in-the-middle is punished. According to the method, the man-in-the-middle cost can be greatly reduced, and the replacement attack of the ciphertext can be resisted.

Description

technical field [0001] The invention relates to the technical field of block chains, in particular to a tamper-proof timing data confidential transmission method based on block chain smart contracts. Background technique [0002] Timed-Release Encryption (TRE) solves the problem of "sending a message that can only be decrypted after a specified time". Existing TRE solutions can be simply divided into two types: TLP and proxy server. The TLP solution is to realize TRE by solving some non-parallel computing problems. Due to the non-parallelism of the problem design, it can be estimated that it will take time to solve the problem. Use this as the time control for decryption. The proxy server scheme is divided into interactive proxy server (trusted proxy) and non-interactive server. Both methods set up a "time server", and the decryption is completed through the time trapdoor issued by the time server at a specified time. [0003] The limitations of existing TRE technologies...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the intermediary deposit in the existing model is too large and cannot cope with the replacement attack, and propose a tamper-proof timing data confidential transmission method based on blockchain smart contracts

Images