Advanced attribute-based protocol based on the modified secret sharing scheme

TL;DR

This paper introduces a novel attribute-based encryption protocol utilizing a modified secret sharing scheme that simplifies key management and maintains efficiency regardless of attribute universe size.

Contribution

It presents a new attribute-based encryption protocol based on a modified secret sharing scheme requiring only one master key per user, with proven security.

Findings

Single master key per user reduces complexity

Efficiency unaffected by attribute universe size

Security proofs validate the scheme's robustness

Abstract

We construct a new protocol for attribute-based encryption with the use of the modification of the standard secret sharing scheme. In the suggested modification of the secret sharing scheme, only one master key for each user is required that is achieved by linearly enlarging public parameters in the access formula. We then use this scheme for designing an attribute-based encryption protocol related to some access structure in terms of attributes. We demonstrate that the universe of possible attributes does not affect the resulting efficiency of the scheme. The security proofs for both constructions are provided.