Cryptanalysis of a Pairing-free Certificateless Signcryption scheme
Philemon Kasyoka,
Michael Kimwele,
Shem Mbandu Angolo
Affiliations
Philemon Kasyoka
School of Computing and Information Technology, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya; School of Information and Communication Technology, South Eastern Kenya University, Kitui, Kenya; Corresponding author at: School of Computing and Information Technology, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya.
Michael Kimwele
School of Computing and Information Technology, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
Shem Mbandu Angolo
School of Computing and Mathematics, Co-operative University of Kenya, Karen-Nairobi, Kenya
Signcryption is a very useful cryptographic primitive that aims to achieve authentication and confidentiality in an efficient manner. We cryptanalyze the signcryption scheme of Wei and Ma (2019) which is claimed to be secure. Further, we propose a corresponding modification to show how their signcryption scheme can be made more secure in our proposed signcryption scheme. The security analysis is also applicable to other signcryption schemes with similar design.
