The emergence of some quantum algorithms has brought a serious threat to modern cryptography,among which Shor's algorithm is the most important threatening algorithm for cryptanalysis currently.Shor's algorithm can solve the integer factorization problem(IFP) and discrete logarithm problem(DLP) in polynomial-time,which makes the current widely used RS A,ElGamal and ECC public key cryptosystem unsafe any more under the quantum computing environment.Therefore,it is necessary to research the cryptanalysis in t...