Cryptanalysis and improvement of blind signcryption scheme based on elliptic curve. Issue 8 (1st April 2019)

• Record Type: Journal Article
• Authors: Bashir, Malik Zia Ullah; Ali, R.
• Is Part Of: Electronics letters. Volume 55:Issue 8(2019)
• Page Start: 457
• Page End: 459
• Publication Date: 2019-04-01
• Subjects: public key cryptography -- digital signatures -- electronic money; elliptic curve -- blind signcryption scheme -- signcryption schemes -- electronic voting -- electronic cash payment systems; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2019.0032
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Blind signcryption schemes are the extension of signcryption schemes. They are used to protect the privacy and identity of the sender from other users, especially in electronic voting and electronic cash payment systems. A number of blind signcryption schemes are introduced over the years and some of them are proved to be insecure. In this Letter, the authors analysed a recently proposed blind signcryption scheme based on elliptic curves and proved it is insecure. Their analysis showed that the proposed scheme is unable to provide the claimed security attributes of message integrity, authentication, unforgeability, and signer non‐repudiation. After successful cryptanalysis, they introduced a modified version of this scheme to overcome the security flaws and weakness.