An Anonymous Multireceiver with Online/Offline Identity-Based Encryption

Table 1

The notations of the symbols.

Symbols	Meanings of the symbols
	The number of all users
	The number of authorized receivers,
	The computational cost of one bilinear pairing operation
	The cost of symmetric encryption or decryption one message
	The computational cost of one scalar multiplication in
	The computational cost of exponentiation computation in
	The computational cost of multiplication in
	The computational cost of multiplication in
	The computational cost of addition in
	The computational cost of addition in
	The computational cost of exponentiation computation in
	The computational cost of one general hash operation
	The computational cost of one hash-to-point operation
	The bit length of an element in .
	The length of hash value
	The bit length of a plaintext messages