|
| Schemes | Contributions | Limitations |
|
| Blockchain-based CSN |
| Blockchain-based incentive mechanism for CSNs [18] | Ensures data quality, increases participation level, and preserves the privacy of the workers | Collusion attacks are ignored between anonymity groups and miners |
| A decentralized privacy-preserving incitement mechanism for CSNs [19] | Ensures privacy by using affine cipher and stimulates user involvement | Insecure communication platform and does not consider service consumers |
| Blockchain-based crowd sensing system (BCS) [20] | Provides authentic anonymity of the workers and system robustness | Possibility of privacy leakage of workers while submitting location for efficient job allocation |
|
| Incentive mechanism-based CSN |
| A social incentive mechanism for CSN [9] | Promotes global cooperation | Structure of participant’s social relationship is not considered |
| Incentive mechanism for CSN named as QUOIN [10] | Provides quality and usability of information and stimulates participation rate | Single point of failure and mutability |
| Incentive mechanism based on contract theory for mobile CSNs [21] | Increases participation rate and maximizes platform’s profitability | Centralized server causes delay in performance |
| Incentive mechanism involving ParticipAct platform for CSNs [22] | Promotes user active collaboration | Single point of failure and no transparency |
|
| Privacy mechanism-based CSN |
| CSN as a service and contribution [23] | Preserved privacy with AES256 | No traceability mechanism |
| DTRPP [24] | Combined public key with trust management mechanism for tackling the issue of privacy | Ineffective in terms of cost |
| Location preserving mechanism of mobile users by combining -anonymity and differential privacy [25] | Protects location of mobile users | Ineffective in terms of cost |
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