Research On Transport Layer Security Protocol Based On Lattices

In the context of the information age,the Internet has been fully integrated into our daily life.The frequency of network attacks is increasing.Transport layer security(TLS)protocol has become the most widely used secure communication protocol.However,quantum computing technology is also gradually developing so that the occurrence of quantum attacks becomes possible.TLS protocol based on the traditional cryptosystem Diffie-Hellman key exchange protocol is no longer secure.Constructing a TLS protocol that can resist quantum attacks is important.The lattice-based cryptosystem is one of the popular directions of quantum-resistant cryptosystems.But few existing schemes combine lattice-based key exchange with TLS protocol.Therefore,with the development status of quantum computing technology,this paper investigates the application of quantum-resistant cryptosystems and TLS protocol to adapt to the needs of the development of quantum technology.This paper revolves around the research on transport layer security protocols based on lattices.The main research contents are as follows.(1)A lattice-based key exchange protocol is proposed.It adopts the arbitrary cyclotomic ring and the ring learning with errors problem as the theoretical basis,which makes the parameter selection more flexible.It can also achieve the same security level as the special cyclotomic ring when the dimension of the ring is small.And the computational efficiency of the ring can be significantly improved.Compared with the key exchange protocol based on learning with errors problem,our scheme has the advantage of small parameter size and the overheads of computation and storage.Compared with the key exchange protocol based on ring learning with errors problem,the parameter selection range is larger and more flexible.The computational efficiency is also improved.These advantages make our protocol more applicable and useful.(2)A transport layer security protocol based on key exchange protocol with lattices is proposed.This paper combines our proposed lattice-based key exchange protocol with TLS protocol,that is,the key exchange protocol used in TLS protocol based on finite field or elliptic curve key exchange mode is optimized to lattice-based key exchange protocol so that the handshake process of TLS protocol will have the ability to resist quantum attacks.Compared with the original TLS protocol,our scheme not only improves the computational efficiency of shared keys but also makes the protocol capable of resisting quantum attacks.Our protocol is more responsive to the current state of quantum computing development and has better practicality.