Secret Sharing and Proactive Renewal of Shares in Hierarchical Groups
Ruchira Naskar, Indranil Sengupta · International Journal of Computer Science and Information Technology · 2010
Secret sharing in user hierarchy represents a challenging area for research.Although a lot of work has already been done in this direction, this paper presents a novel approach to share a secret among a hierarchy of users while overcoming the limitations of the already existing mechanisms.Our work is based on traditional (k + 1, n)-threshold secret sharing, which is secure as long as an adversary can compromise not more than k secret shares.But in real life it is often feasible for an adversary to obtain more than k shares over a long period of time.So, in our work we also present a way to overcome this vulnerability, while implementing our hierarchical secret sharing scheme.The use of Elliptic Curve Cryptography makes the computations easier and faster in our work.