Dynamic threshold secret sharing scheme
Yiqi Dai · Journal of Tsinghua University(Science and Technology) · 2006
Known threshold secret sharing schemes have limited flexibility when dealing with the dynamic joining and leaving of the participants.A threshold secret sharing scheme was developed and a utility method to solve the Lagrange interpolation was proposed.The scheme allows the participants to join or leave dynamically,without re-distributing the sub-secrets,which is easier to implement.As the sub-secrets are kept secretly by the participants and it is the shadows of the sub-secrets that is published,the sub-secrets can be re-utilized.The scheme requires less computing time than threshold secret sharing with direct general access structure secret sharing.