If a Key Is 43 Bits Long, How Much Longer

question 18

Multiple Choice

If a key is 43 bits long, how much longer will it take to crack it by exhaustive search if it is extended to 50 bits?

• A) 7 times as long
• B) 14 times as long
• C) 128 times as long
• D) 256 times as long

---

Definitions:

Negative Reinforcement

The removal of a stimulus that in turn increases or maintains the probability of some behaviour.

Punishment

The application of an aversive stimulus following some behaviour designed to decrease the probability of that behaviour.

Modelling

The process of creating representations of complex systems or behaviors to simplify analysis and understanding.

Negative Reinforcement

Negative reinforcement is a behavioral principle where the removal of an unfavorable condition strengthens or increases the likelihood of a desired behavior.