Recently, a certificateless signcryption scheme in the standard model was proposed by Liu et al. in [1]. Another certificateless signcryption scheme in the standard model was proposed by Xie et al. in [2]. Here, we show that the scheme in [1] and [2] are not secure against Type-I adversary. 1 Certificateless Signcryption Scheme by Liu et al.[1] 1.1 Review of the Scheme In this section, we revie...

The rapid progress in the internet requires multiple message communication over the wider area to improve the mobile network security. Due to the multiple message communication, the security is a most important concern in mobile network. The bilinear Certificate less Aggregate Signcryption Scheme guarantees the security under several attacks, and therefore provides security and non-repudiation....

Security and privacy issues were long a subject of concern with drones from the past few years. This is due to lack security considerations in design drone, which includes unsecured wireless channels insufficient computing capability perform complex cryptographic algorithms. Owing extensive real-time applications ubiquitous connection beyond 5G (B5G) networks, efficient measures are required pr...

A multi-recipient signcryption (MRSC) scheme possesses the functionalities of both public-key encryption and digital signature to ensure integrity confidentiality transmitted messages. Moreover, an anonymous MRSC (AMRSC) retains while offering privacy-preserving, namely, a recipient’s identity or public key being hidden other recipients. In past, numerous AMRSC schemes based on various cryptogr...