Review of Key-Based Dynamic Trust Authorization Mechanism

This paper includes the theory developments and main characteristics of Policymaker, KeyNote, REFEREE, and SPKI/SDSI2.0 Key-Based Dynamic Trust Authorization Mechanisms in distributed environments; discusses the applications and existing security problems of cloud computer and mobile computer Key-Based Dynamic Trust Mechanisms in new distributed environment; describes the role that trust degree plays in solving the security problems of Dynamic Trust Mechanism in new distributed environments, and indicates Certificateless Public Key Cryptography is another development direction for Dynamic Trust Mechanism.