Accession Number : ADA461227


Title :   Verifiable Secret Redistribution for Threshold Sharing Schemes


Corporate Author : CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE


Personal Author(s) : Wong, Theodore M ; Wang, Chenxi ; Wing, Jeannette M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a461227.pdf


Report Date : Oct 2002


Pagination or Media Count : 19


Abstract : We present a new protocol for the verifiable redistribution of secrets from (m,n) to (m',n') access structures for threshold sharing schemes. Our protocol enables the addition or removal of shareholders and also guards against mobile adversaries that cause permanent damage. We observe that existing protocols either cannot be readily extended to allow redistribution between different access structures, or have vulnerabilities that allow faulty old shareholders to corrupt the shares of new shareholders. Our primary contribution is that, in our protocol, new shareholders can verify the validity of their shares after redistribution between different access structures.


Descriptors :   *SHARING , *COMMUNICATIONS PROTOCOLS , *INFORMATION SECURITY , DATA PROCESSING SECURITY , VERIFICATION , MULTIPLE ACCESS , VALIDATION , DISTRIBUTION


Subject Categories : Computer Systems Management and Standards


Distribution Statement : APPROVED FOR PUBLIC RELEASE