A Privacy-Preserving Attribute-Based Encryption System for Data Sharing in Smart Cities

Table 3

List of notations.

Notations	Explanations
	Access control policy tree
	Attribute authority index
	Attribute set authorized by
	Universal attribute set
	Ciphertext of access control policy
	Global identity
	Attribute authority public key
	Attribute authority secret key
	Secret key of attribute for user with
	Extended attribute set with index
	A binary string with 0-encoding transformed by attribute
	A binary string with 1-encoding transformed by attribute