| Summary: | Emerging Unmanned Aerial Vehicles (UAVs) have applications for traffic monitoring, public safety, surveillance, agriculture, health services. Collaborative UAVs can form flying ad hoc networks, although such networks are especially vulnerable to security vulnerabilities due to open access media and limited power. Very recently, Khan <italic>et al.</italic> presented an Identity-Based Generalized Signcryption having Multi-access Edge computing to secure Flying Ad hoc Networks (FANETs). First, this paper presents the cryptanalysis of the Khan <italic>et al.</italic> scheme and shows that their scheme does not provide message confidentiality, Authenticity, and integrity. Second, it presents an improved scheme as well. The comparison of the improved scheme with the state of the art schemes based on security and cost shows, it is efficient, provably secure against security attacks, and suitable for multi-access edge computing empowered FANETs.
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