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A User Centric Security Model for Tamper-Resistant Devices

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7.7 Analysis of the Proposed Protocols<br />

SOG<br />

Table 7.3: Protocol comparison on the basis of stated goals (see sections 7.3.7 and 6.2.3)<br />

Protocols<br />

STS AD ASPeCT JFK T2LS SCP81 MM SM PBP ABPD ABPL<br />

1. Mutual Entity Authentication ∗ ∗ ∗ ∗ ∗ ∗ −∗ −∗ ∗ ∗ ∗<br />

2. Exchange Certicate ∗ ∗ ∗ ∗ ∗ ∗ ∗ −∗ ∗ ∗ ∗<br />

3. Mutual Key Agreement ∗ ∗ ∗ ∗ ∗ ∗ ∗ −∗ ∗ ∗ ∗<br />

4. Joint Key Control ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗<br />

5. Key Freshness ∗ ∗ ∗ ∗ ∗ ∗ ∗ −∗ ∗ ∗<br />

6. Mutual Key Conrmation ∗ ∗ ∗ ∗ −∗ ∗ ∗ ∗<br />

7. Known-Key <strong>Security</strong> ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗<br />

8. Unknown Key Share Resilience ∗ ∗ ∗ ∗ ∗ ∗ ∗ −∗ ∗ ∗ ∗<br />

9. KCI Resilience ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗<br />

10. Perfect Forward Secrecy ∗ ∗ ∗ ∗ ∗ ∗ ∗<br />

11. Mutual Non-Repudiation ∗ (∗) +∗ ∗ ∗ ∗ +∗ +∗ ∗ ∗ ∗<br />

12. PCK Attack Resilience (∗) (∗) (∗) (∗) (∗) ∗ ∗<br />

13. Trust Assurance ∗ −∗ ∗ −∗ −∗<br />

14. DoS Prevention ∗ ∗ ∗ ∗<br />

15. Privacy (∗) ∗ ∗ ∗ ∗<br />

16. Simulator Attack Resilience −∗ ∗ ∗ ∗<br />

20. Application Masquerading (∗) (∗) (∗) (∗) (∗) (∗) (∗) (∗) ∗ ∗<br />

21. Dierent <strong>User</strong>'s Application ∗ ∗<br />

Note: ∗ means that the protocol meets the stated goal, ∗∗ indicates that the protocol meets the SOG if required by the communicating entities, (∗) shows that the<br />

protocol can be modied to satisfy the requirement, +∗ shows that protocol can meet the stated goal but requires an additional pass or extra signature generation, and<br />

−∗ means that the protocol (implicitly) meets the requirement not because of the protocol messages but because of the prior relationship between the communicating<br />

entities.<br />

183

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