Reliable group key distribution protocol with source authentication
Summary :
Table of Contents
- Introduction
- Notations
- Logical key tree at group controler
- Join operation
- Leave operation
- Replay attack
- Scenario 1
- Session hijack
- Scenario 2
- Delayed disclosure
- Scenario 3
- The approach
- One-way chains
- Authentication procedure
- Simple join with source authentication
- Simple leave with source authentication
- Tree balancing
- Reliability
- Simulation results
- Conclusion
- References
Abstract
IP multicast provides efficient group communications. It conserves network resources by transmitting a single copy of the packet on each link. It also supports large multicast groups with frequent membership changes. But it does not ensure secure and reliable communication of multicast data. For the applications that require secure communication, cryptographic techniques are to be applied. If symmetric cryptography is used, source encrypts the multicast data using a traffic encryption key, TEK, and transmits to group members. group members have to decrypt the data using the same key. Hence the key is to be distributed to all group members called group key distribution. The group key distribution should be performed securely and reliably.
key Words - group Communications, Security, Re-keying, Packet-injection, One-way chain & Reliability
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