Research on Privacy Protection of Technology Service Transactions Based on Blockchain and Zero-Knowledge Proof

Table 2

Comparison of time complexity in different schemes.

Schemes	Privacy	Scalability	On-chain computability	Storage overhead
[16]	Poor	Strong	Strong	High
[17]	Neutral	Strong	Poor	Low
[18]	Poor	Neutral	Neutral	Low
[20]	Strong	Neutral	Strong	Low
[21]	Strong	Neutral	Strong	Low
[22]	Poor	Neutral	Neutral	Low
This paper	Strong	Strong	Neutral	Low