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Accession Number:
AD1049878
Title:
A New Approach to Threshold Attribute Based Signatures
Report Date:
2011-01-01
Abstract:
Inspired by developments in attribute based encryption and signatures, there has recently been a spurt of progress in the direction of threshold attribute based signatures (t-ABS). In this work we propose a novel approach to construct threshold attribute based signatures inspired by ring signatures. Threshold attribute based signatures, defined by a (t, nx3;) threshold predicate, ensure that the signer holds at least out of a specified set of nx3; attributes to pass the verification. Another way to look at this would be that, the signer has at least 1 out of the (nx3; t) combination of attribute sets. Thus, a new approach to t-ABS would be to let the signer pick some n sets of t attributes each, from the (n x3;tx1;) possible sets, and prove that (s) he has at least one of the n sets in his/her possession. In this work, we provide a flexible threshold-ABS Inspired by developments in attribute based encryption and signatures, there has recently been a spurt of progress in the direction of threshold attribute based signatures (t-ABS). In this work we propose a novel approach to construct threshold attribute based signatures inspired by ring signatures. Threshold attribute based signatures, defined by a (t; nx3;) threshold predicate, ensure that the signer holds at least out of a specified set of nx3; attributes to pass the verification. Another way to look at this would be that, the signer has at least 1 out of the (n x3;t)x1; combination of attribute sets. Thus, a new approach tot-ABS would be to let the signer pick some n0 sets of t attributes each, from the (nx3; t) x1;possible sets, and prove that (s)he has at least one of the n0 sets in his/her possession. In this work, we provide a flexible threshold-ABS scheme that realizes this approach. We also prove our scheme to be secure with the help of random oracles.
Document Type:
Conference:
Journal:
Pages:
14
File Size:
0.41MB
Contracts:
Grants:
Distribution Statement:
Approved For Public Release
