Audit Outsourced Data in Internet of Things

Table 2

Comparison of computation overhead for different entities at different stages.

Stage entity		Data outsourcing	TPA audit	Insert	Delete	Modify
User side	Our	+  +	0	+  +		+  +
	Rao’s	+  +	0	+  +  +	+  +	+  +  +
CSP side	Our	+  +  +	+	+  +	+	+  +
	Rao’s	+	+	+	+	+
TPA side	Our	0	+  +  +	+	+	+
	Rao’s		+  +