Many emerging network applications are based upon group communication models and are implemented as either one-to-many or many-to-many multicast. As a result, providing multicast confidentiality is a critical networking issue and multicast security has become an active research area. To secure the sessions, a common group key is maintained to encrypt the traffic, and the key is updated whenever a new member joins the group or an existing member leaves. In this paper we analyze the security of a centralized key distribution protocol for one-to-many multicast and a decentralized key agreement protocol for many-to-many multicast. We show that they both fail to provide forward and backward security. The first protocol is revealed to be vulnerable to a single adversary due to an algorithmic issue. The second protocol, however, is subject to sophisticated collusion. Remedial approaches are proposed for both key management schemes to effectively resist relevant attacks.
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Cryptanalysis of Two Group Key Management Protocols for Secure Multicast
Wen Tao Zhu
- Springer Berlin Heidelberg
Neuer Inhalt/© ITandMEDIA