When preparing an image for web display it a. must be in landscape mode. b. must be in portrait mode. c. must be in square format. d. can be in either landscape or portrait mode

3. bob is arguing that if you use output feedback (ofb) mode twice in a row to encrypt a long message, m, using the same key each time, it will be more secure. explain why bob is wrong, no matter what encryption algorithm he is using for block encryption (15 points).

The "instance" relationship shows that something is an object of a

Which option correctly describes a dbms application? a. software used to manage databases b. software used to organize files and folders c. software used to develop specialized images d. software used to create effective presentations