Joint Compartmented Threshold Access Structures

Provided by: Bilkent University
Topic: Security
Format: PDF
A secret sharing scheme is a method of distributing a secret value among members of a group such that only certain coalitions of these participants can find the secret. A subset of users that can recover the secret is called a qualified coalition, and the set of all qualified coalitions is called the access structure. An access structure is called monotone if every coalition containing a qualified coalition as a subset is also a qualified coalition. An important class of access structures is the threshold access structure, where a coalition is qualified if and only if it has at least t members for some specified threshold t.

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