Co-Check: Collaborative Outsourced Data Auditing in Multicloud Environment

Table 2

Theoretical analysis of various solutions.

	Property
Scheme	Communication	Computation		Storage		Type	Unbounded	Error correct	Batch verify
		Client	Server	Client	Server
PDP [5]						Pr.
RIC [3]						Det.
POR [16]						Pr.
CPOR [17]						Pr.
DPDP [6]						Pr.
CPDP [9]						Pr.
Wang [37]						Pr.
Hao [32]						Det.
Our Scheme						Pr.

is the verification time allowed by the scheme; Type means guarantee types provided by the scheme; Det. and Pr. represent Deterministic guarantee and Probabilistic guarantee, respectively; is the number of the file blocks.