Proxy Signature Scheme with Effective Revocation Using Bilinear Pairings

TL;DR

This paper introduces a bilinear pairing-based proxy signature scheme that enables efficient revocation and avoids secure channels during key issuance, addressing key escrow issues and enhancing security.

Contribution

It proposes a novel proxy signature scheme with a binding-blinding technique for key issuance that prevents key escrow and eliminates the need for secure channels.

Findings

Provides effective proxy revocation

Resists common security threats

Overcomes key escrow problem

Abstract

We present a proxy signature scheme using bilinear pairings that provides effective proxy revocation. The scheme uses a binding-blinding technique to avoid secure channel requirements in the key issuance stage. With this technique, the signer receives a partial private key from a trusted authority and unblinds it to get his private key, in turn, overcomes the key escrow problem which is a constraint in most of the pairing-based proxy signature schemes. The scheme fulfills the necessary security requirements of proxy signature and resists other possible threats.