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Summary: 1
Gothic: A Group Access Control Architecture for
Secure Multicast and Anycast
Paul Judge and Mostafa Ammar
College of Computing, Georgia Institute of Technology, Atlanta, GA 30332
fjudge,ammarg@cc.gatech.edu
Abstract--- Multicast and anycast have received consider
able attention due to their ability to support networked ser
vices. There are distinct and significant security vulnerabili
ties in both the multicast and anycast model including denial
of service, theft of service, eavesdropping, and masquerad
ing. The multicast problem requires a secure IGMP. The
anycast problem requires secure anycast server advertise
ments. We generalize these two problems into a problem of
group access control and propose Gothic, a complete archi
tecture for providing group access control. Gothic centers
around a novel authorization architecture. This is comple
mented by a proposal for a group policy management sys
tem that allows the group owner to be authenticated before
being allowed to specify the group access rights. This sys
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