An Efficient Revocable Identity-Based Encryption with Equality Test Scheme for the Wireless Body Area Network

Table 2

Notations.

Notations	Meaning
	The public system parameters
	The system life time
	The master private key
	The user’s identity
	The user initial key
	The user time key
	The message
	The ciphertext
	The trapdoor
	The ciphertext-trapdoor pair of the user
	The ciphertext-trapdoor pair of the user