Cryptology ePrint Archive: Report 2017/217

Cryptanalysis of Wang et alís Certificateless Signature Scheme without Bilinear Pairings

Kuo-Hui Yeh

Abstract: In these years, the design of certificateless signature (CLS) scheme without bilinear pairings has been thoroughly investigated owing to its effectiveness on solving the key escrow problem in identity-based cryptography. In this paper, we identify that Wang et al.ís certificateless signature scheme cannot fulfil its security claims. We present a series of attack processes to demonstrate that Wang et al.ís scheme is insecure against a super type I adversary.

Category / Keywords: cryptographic protocols /

Date: received 1 Mar 2017, last revised 1 Mar 2017

Contact author: khyeh at gms ndhu edu tw

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Version: 20170304:141115 (All versions of this report)

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