Control system can not only automatically identify the parameters but also automatically adapt the drift of parameters with the new way, so continuous stability and accuracy on dynamic running state of control system is realized.

Practical group signatures based on the knowledge signature;

In this scheme, it evolves all participants shares from the sharing secret based on the natural evolution thought, and ensures that any party can verify the correctness of the shares using the method of knowledge signature; In turn, any k shares after verified their validness can restructure the secret based on the theory of solving the linear equations.

The concept of signature of knowledge is adopted in this scheme .

Zhang et al proposed an efficient group signature scheme which was claimed to be more efficient than the well known ACJT scheme,because expensive signature of knowledge,a component in a majority of group signature schemes,was avoided in generating the group signature.

To improve the efficiency of group signature, an efficient and secure dynamic group signature scheme is proposed based on the ELGamal encryption and signature of knowledge.