Quantum Vernam Encryption Algorithm And The Research Of The Arbitration Quantum Signature Scheme

As the human into the information age, information security becomes more and more important.. To protect information security, cryptography provides an important method and means.Quantum cryptography is the combination of quantum mechanics and cryptography.Its security depends on the basic principles of quantum mechanics,it has a higher security than traditional cryptography.The content of this article is divided into the following several aspects:introduction to this topic research·background and significance;an improved scheme of quantum Vernam encryption algorithm; quantum teleportation and based on symmetric W state arbitration quantum signature algorithm.Quantum Vernam encryption algorithm has the advantage of keys can be repeated use than classic Vernam algorithm,but the encryption key is vulnerable to Trojan Horse attacks.A improved algorithm is proposed in this paper,that can effectively prevent Trojan Horse attacks.Later, quantum Vernam encryption algorithm is generalized to d-level systems by some scholars.The same,its encryption key is attacked by Trojan Horse.A improved algorithm in d-level systems is proposed by using a similar method in this paper. The encryption keys is not attacked by Trojan Horse.By Gisins paper we know quantum teleportation is also a kind of encryption algorithm. The general form of W states as quantum channel is studied in this paper,it is Similar to quantum teleportation by symmetry W states as quantum channel is realized.Finally,the arbitration quantum signature algorithm based on symmetric W state is studies in this paper.