Group Key Management (cont.)
- Two aspects:
- Computing the key
- Distributing the key.
- Methods:
- Fixed Key Server: one fixed server selects
and distributed the key.
IT DOES NOT SUPPORT NETWORK
PARTITIONS !
- One member of the group acts as a key server. These methods try to minimize the distribution cost.
- Contributory methods: each member contributes a share to the group key.