Fast and Universal Inter-Slice Handover Authentication with Privacy Protection in 5G Network

Table 1

Explanations on symbols in the FUIS.

Notation	Meaning
	is chosen at random from a set
	The concatenation of two-bit strings and
	A secure hash function, for
	A finite field of the prime power order p
	An elliptic curve over
	The subgroup of the prime order in
	A finite field of integers modulo prime
	The identity of the entity E
	A secure chameleon hash function
	The current time used as a timestamp
	The expiration time of the ticket
	The AES algorithm to encrypt and decrypt the message m with the key
	The asymmetric encryption of the public key pk
	The signature on the message m of the private key sk
	A set of public keys for the ring signature, for E = {A3VI, ope}
	A ring signature with the RG and the signer’s secret key sk
	Verify the algorithm for the ring signature