A Crowdsourcing Information Obtaining Scheme Aiming at Senior Netizens Based on Blockchain

Table 1

Comparison of privacy protection property.

[4]

[5]

[6]

[7]

[8]

[9]

[10]

[11]

[12]

[13]

[14]

Ours

Privacy protection of outsourcer

Weak anonymity

Strong anonymity

×

×

×

Weak anonymity

Weak anonymity

Weak anonymity

Weak anonymity

×

×

Strong anonymity

Privacy protection of contractor

Weak anonymity

Weak anonymity

×

×

×

Weak anonymity

Weak anonymity

Weak anonymity

×

×

×

Strong anonymity

Privacy protection of transaction data

No protection of transaction amount

×

×

×

×

√

√

√

√

√

√

√