Several techniques have been proposed for the distribution of public keys. The proposals can be grouped into the following four general schemes: public announcement, publicly available directory, public-key certificates, and ____________.

A cryptographic nonce is important for confirming that a party is active and fully participating in a protocol exchange. One reason attackers can succeed with many web-page attacks is that it is relatively easy to craft authentic-looking pages that spoof actual sites. Suggest a technique by which a user can be assured that a page is both live and authentic from a particular site. That is, design

a mark, data interchange, or some other device that shows the authenticity of a web page. What will be an ideal response?

The figure/ground relationshipis about drawing the human figure on a surface.

Answer the following statement true (T) or false (F)