A workable and efficient data link layer security protocol had been proposed on the need of safety information transfer requirements of the TES system.The protocol provides a software registration solution for the remote sites and a information encryption method base on the elliptic curves cryptography（ECC） algorithm as well as a combined key allocation method.The protocol takes the characters of the TES system into account

improves its ability to identify remote sites

and provides ways to prevent information stealing and network attacks.