CLASRM: A Lightweight and Secure Certificateless Aggregate Signature Scheme with Revocation Mechanism for 5G-Enabled Vehicular Networks

Table 1

Symbols and description.

Symbols	Description
	Two large primes
	An elliptic curve
	A cyclic additive group
	A generator of the group
	A trusted authority
	A key generation centre
	A trace authority
	The vehicle
	A road side unit
	An onboard unit
	The public/private key pair of the KGC
	The public/private key pair of the TRA
	Four one-way collision-resistant hash functions
	The partial private key of the vehicle
	The public/private key pair of the vehicle
	The pseudo identity of the vehicle
	The real identity of the vehicle
	A valid period of the pseudo identity
	The latest time stamp
	The bit-wise exclusive-OR (XOR) operation
||	The message concatenation operation
	A traffic-related sensing message
	A certificateless signature on a message