Accession Number:

ADA461136

Title:

Broadcast Enforced Threshold Schemes with Disenrollment

Descriptive Note:

Conference paper

Corporate Author:

WASHINGTON UNIV SEATTLE DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

Report Date:

2003-01-01

Pagination or Media Count:

16.0

Abstract:

Blakley, Blakley, Chan and Massey conjectured a lower bound on the entropy of broadcast messages in threshold schemes with disenrollment. In an effort to examine the conjecture, we identify their original scheme definition has a limitation a coalition of participants can reconstruct all shared secrets without broadcast from the dealer, and hence render the dealer no control over disenrollment. We introduce a constraint that delays this lack of control of the dealer over disenrollment. We also establish the lower bounds on the entropy of broadcast messages in such a model. We demonstrate the need for new models by presenting a construction under open problems.

Subject Categories:

  • Radioactivity, Radioactive Wastes and Fission Products
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE