Paper 2020/1537

Comments on “ Multi Recipient Aggregate Signcryption Scheme Based on Elliptic Curve”

Nizamud Din, Abdul Waheed, and Nasir Saeed

Abstract

Aggregate signcryption combines the functionalities of aggregate signature and encryption. Very recently, Zia & Ali [1] (Wireless Personal Communications, https://doi.org/10.1007/s11277-020-07637-z) proposed an elliptic curve cryptography (ECC) based multi-recipient aggregate signcryption scheme. The authors claimed that their scheme is correct, efficient, and secure against known attacks. However, by this comment, we show that their scheme is incorrect and the receiver(s) is unable to unsigncrypt the message.