Integrity Audit of Shared Cloud Data with Identity Tracking

Table 1

The meaning of the notation.

Notation	Meaning	Notation	Meaning
	A bilinear pairing map	name	Representative data identifier
H	A hash function		The identity of the user
G1 G2	Multiplicative groups with order q		The blinded block
	A prime field with nonzero elements		Random select from
F	The data file shared in the cloud		The group member’s secret key
	The block of the shared cloud data file,that is F=,m2,m3		The group member’s partial secret key
	Represents data block number	X	The RDC’s secret key
	The challenge message sent to CSP by the TPA	proof	The proof message sent to TPA by the CSP
audit request	The audit message sent to TPA by the RDC	TPA	Third party audit
RDC	Rights distribution center	User	Receive cloud service
CSP	Cloud service provider	UIT	User identity table