A Secure and Efficient Audit Mechanism for Dynamic Shared Data in Cloud Storage

Table 1

Connections and communication costs for updating a data block.

	Wang et al. [16]	Zhu et al. [15]	Yang and Jia [14]	Our scheme
Connections	𝑢𝑘↔CSP	𝑢𝑘↔TPA	𝑢𝑘 with other users	𝑢𝑘↔TPA
		𝑢𝑘↔CSP	𝑢𝑘↔TPA	𝑢𝑘↔CSP
			𝑢𝑘↔CSP
Extra communication costs	𝑞id+|id|	𝑞id+|id|+𝑢info	𝑑×𝑢info	𝑞id+|id|+𝑢info