Research Article
A Secure Fair Exchange for SMS-Based Mobile Payment Protocols Based on Symmetric Encryption Algorithms with Formal Verification
Table 12
Comparison of fair exchange protocols.
| | Protocol | Type of Fairness | Use TTP | TTP Type |
| | [13] | Weak | Yes | Inline |
| | [26] | Weak | Yes | Online |
| | [15] | Weak | Yes | Online |
| | [21] | Weak | Yes | Offline |
| | [23] | Weak | Yes | Offline |
| | [24] | Weak | Yes | Offline |
| | [17] | Weak | Yes | Online |
| | [11] | No Fairness | No | Without TTP |
| | Purchase Credit | Strong | Yes | Online |
| | Making Payment | Strong | Yes | Online |
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