Which statement is NOT true regarding hierarchical trust models? a. It is designed for use on a large scale. b. The root signs all digital certificate authorities with a single key. c. It assigns a...

Which statement is NOT true regarding

hierarchical trust models?

a. It is designed for use on a large scale.

b. The root signs all digital certificate

authorities with a single key.

c. It assigns a single hierarchy with one

master CA.

d. The master CA is called the root.