Network Security FAQ: Cryptography Q1. How many possible keys are there for an 8-bit key? a. 8 b. 82 c. 28 d. 65,536 Answer: c. There are 8 bits in that key, and all those bits can have two different values. To calculate the possible keys, multiply 2 by 2 by 2one time for every bit, or 28. Q2. Which type of cipher typically acts on small units of data? a. Block … [Read more...]