[Resource Topic] 2017/217: Cryptanalysis of Wang et al’s Certificateless Signature Scheme without Bilinear Pairings

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Title:
Cryptanalysis of Wang et al’s Certificateless Signature Scheme without Bilinear Pairings

Authors: 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.’s certificateless signature scheme cannot fulfil its security claims. We present a series of attack processes to demonstrate that Wang et al.’s scheme is insecure against a super type I adversary.

ePrint: https://eprint.iacr.org/2017/217

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