1. What does it mean for a signed document to be verifiable and nonforgeable? 2. In the link-state routing algorithm, we would somehow need to distribute the secret authentication key to each of the...

1. What does it mean for a signed document to be verifiable and nonforgeable?

2. In the link-state routing algorithm, we would somehow need to distribute the secret authentication key to each of the routers in the autonomous system. How do we distribute the shared authentication key to the communicating entities?