Quantum secure direct communication method based on Omega state and ultra dense coding

Abstract

The invention provides a QSDC protocol of a quantum secure direct communication method based on an Omega state and ultra dense coding. Assigning a key is a very important research topic in the cryptography, unlike the traditional encryption algorithms based on mathematical difficulties, a quantum secure transmission protocol is based on the physics and can be proved to be theoretically secure, theoriginal QSDC protocol divides entangled particles into two sequences, a check sequence is used for detecting an intrusion behavior, a message coding sequence is used for transmitting a ciphertext, however, the efficiency of the intrusion detection mode is worse, and to improve the efficiency of the intrusion detection, a QSDC protocol based on the Omega state is proposed. A sender forms a message qubits sequence by using particles in a Bell state so as to transmit security information, inserts a check sequence C into the qubits sequence, and records the location of the check sequence C to obtain a sequence data block T, and a receiver extracts the check sequence C and a quantum bit sequence A from the T, performs Omega measurement on the check sequence C, and compares a measured value with a threshold to judge whether the current environment is secure.

Description

technical field [0001] The invention relates to a quantum safe direct communication method based on the Omega state, which can theoretically improve the efficiency of intrusion detection by using the measurement of information entropy. Background technique [0002] How to distribute secret keys is a very important research topic in cryptography. The only key transmission protocol that has been proved to be theoretically safe is OTP (one time pad). However, OTP needs to transmit a key with the same length as the ciphertext, and the key The key cannot be reused, making it difficult to apply. The key distribution methods widely used today are based on mathematically difficult problems. Through computational complexity, the intruder cannot crack the key within a limited time. However, this method The security of Shor has not been proved theoretically. In 1994, Shor proposed the quantum Las Vegas algorithm, which proved that the traditional encryption algorithm will be cracked in...

AI Technical Summary

Problems solved by technology

However, this method of intrusion detection is inefficient. In order to improve the efficiency of intrusion detection, we propose a QSDC protocol based on the quantum Omega state, which improves the detection efficiency of the original protocol.

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