Application On Digital Signature Based On Quantum Cluster State

Digital signature, digital simulation of handwritten signature, is one of the most important core technologies for information security in information society. It can ensure the reality, safety and integrality of the electronic information. Meanwhile, identity authentication for both sides can be achieved. While the traditional digital signature scheme cannot make sure the absolutely safety of information, because this scheme is based on the mathematical calculation complexity and public-key cryptosystems is easy to break through, which is different with the quantum signature.Quantum signature, based on the physics principles, such as quantum cloning theorem, quantum state collapse and quantum entanglement, has been wildly proven to be the most effective approach for information safety. Most of existing signature protocol achieves its security with the aid of quantum entanglement, and the security is closely correlated with the sustainability of entanglement of the quantum state. According to the known data, most algorithms such as, RSA, DSA and ECDSA has been broke easily by Shor.So in this thesis, with the example of four particle clusters, the clusters with most advantage were chosen to design a new sign agreement to resistance coherent attack. Here is the main context of this thesis:1. An new quantum signature scheme, which can withstand incoherent attack has been put forward. This scheme provides strong non-forgeability and strong non-deniability, both parties can’t denial by the intermediary joint signatures, and privacy has been protected. In order to further verify the signature of the safety and feasibility of the simulation, protocol simulation process is presented on C++ platform. In addition, according to the previous arbitration signature scheme, comparative analysis with transmission of complexity, quantum measurement and quantum state number was also given.2. Using the high security of cluster state signature protocol, incorporate QSCC technology and robot remote control application has been done under ideal experimental condition without considering the external environment. During this application, clusters used as a carrier of information transmission, independent acquisition, coding, packaging information sent back to the control side, and transfer information in real time. To some extent, this attempt had been an interpretation of the concept of “quantum artificial intelligence”. Nevertheless, the feasibility of the application remains a matter of consideration, for the difficulty of the quantum state preparation and complex external environment.