The earliest known, and simplest use, of a substitution cipher was called the __________ cipher and involved replacing each letter of the alphabet with the letter standing three places further down the alphabet.

A ________ box alerts you to a potential problem and gives you the options of continuing or stopping the process

A) message B) dialog C) warning D) window

Information such as your personal interests is added in your Blogger's ________ Information section

A) Additional B) Personal C) My Interests D) My Shared