Match the examples to the task each example illustrates. Assisting transportation flow
Achieving environmental balance
Preserving historical interests
Using available land effectively

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).

All of the following are characteristics that must be contained in any knowledge representation scheme except

Research data that is presented using descriptive language is said to be