Renewable (t,n) threshold secret sharing scheme based on one-way hash chain
Geng Yang · Journal of Communications · 2010
In order to improve the efficiency of rekeying in renewable secret sharing schemes,on the basis of characteristics of one-way hash chain,a new proactive secret sharing scheme was proposed.In the scheme,the updated polynomial’s coefficients were generated by a one-way hash chain,which can save the computation costs of generating a random polynomial.The process of secret sharing was based on IBE public key algorithm,which has excellent security features.Under the assumption of DL problem in finite fields,the shares verification process can prevent cheating among participants efficiently.Theoretical analysis and simulation results demonstrate the improvement of the performance.