With the rise of cloud computing and the wide use of mobile platforms

this paper presents a mobile terminal authentication scheme in cloud computing environment

which is used to solve the problems of security in the traditional identity authentication technology. The programme with two-dimension code for information transmission carrier

combined with dynamic encryption keys

symmetric encryption algorithm and an inverse function. It realized the dynamic authentication of mobile terminal finally. According to the security analysis

the scheme with higher security and flexibility provides a simple structure and does not depend on third-party devices.