Imagine a peer-to-peer network where 1000 users want to communicate in an authenticated and confidential way without a central Trusted Third Party (TTP). ]
1. How many keys are collectively needed, if symmetric algorithms are deployed?
2. How are these numbers changed, if we bring in a central instance (Key Distribution Center, KDC)?
3. What is the main advantage of a KDC against the scenario without a KDC?
4. How many keys are necessary if we make use of asymmetric algorithms? Also differentiate between keys which every user has to store and keys which are collectively necessary