A Proactive Secret Sharing Scheme in matrix projection method. (24th September 2009)

• Record Type: Journal Article
• Authors: Bai, Li; Zou, XuKai
• Is Part Of: International journal of security and networks. Volume 4:Number 4(2009)
• Page Start: 201
• Page End: 209
• Publication Date: 2009-09-24
• Subjects: cryptography -- matrix projection -- Pythagorean triples -- proactive secret sharing -- security -- secret shares -- secret sharing schemes; Computer networks -- Security measures -- Periodicals; 005.805
• Languages: English
• ISSNs: 1747-8405

Abstract

Proactive Secret Sharing (PSS) scheme is a method to periodically renew n secret shares in a (k, n) threshold-based Secret Sharing Scheme (SSS) without modifying the secret, or reconstructing the secret to reproduce new shares. Traditionally, PSS schemes are developed for the Shamir's SSS which is a single SSS. Bai (2006) developed a multiple-secret sharing scheme using matrix projection. This paper presents a distributed PSS method for the matrix projection SSS. Once the new shares are updated, adversaries cannot discover the secrets from k shares which are mixed with past and present shares.