What is the role of a hierarchy of trust in using digital signatures? Select the best answer.

Question $7$ Answer

a$.$

Digital signature processes work at the transport layer of TCP$/$IP$,$ which is below where browser$-$supported hierarchies of trust function.

b$.$

The client$$s operating system, browsers, and applications either embed certificate authorities as trust anchors or use peer$-$to$-$peer trust anchors; the client$$s user must then trust these systems vendors and the installation of their products, and the client$$s user own use of them, to completely trust that received digitally signed files or messages are legitimate.

c$.$

The client$$s operating system, browsers, and applications either embed certificate authorities as trust anchors or use peer$-$to$-$peer trust anchors; the recipient of digitally signed files or messages from that client trusts that the client is properly configured and uses valid certificates, and thus can trust the received content.

d$.$

Certificate authorities, working with government agencies, establish trust anchors on which digital signatures are based; this assures recipients that digitally signed content they receive is from authenticated senders$.$