Improved Public Auditing System of Cloud Storage Based on BLS Signature

Table 1

Notations.

Notations	Descriptions
	Unencrypted data blocks
	Encrypted data blocks
	Multiplicative cyclic group
	Bilinear mapping
	Secure hash function
	Prime field
	Generator of
	System initialization parameter
	User’s data file
	User’s secret key
	Name of data block
	Public key of user
	Challenged subset of
	Authentication label for
	Collection of
	Number of challenged data blocks
, ,	Random values
, , ,	Intermediate parameter
	Collection of authentication labels of multiusers
	The size of an element of
	The size of a label
	The computational cost of a power on
	The computational cost of a multiplication on
	The computational cost of an add on
	The computational cost of a bilinear mapping
	The computational cost of a hash