Which term describes a measure of randomness that strengthens resistance to brute-force attacks?

Which term describes a measure of randomness that strengthens resistance to brute-force attacks?

• A. PRNG (pseudo RNG)
• B. Certificate
• C. Wildcard domain
• D. Entropy

Answer: (D)

Entropy measures how unpredictable a secret is. The more entropy, the larger the possible space of values, which makes brute-force guessing far harder. This measure is expressed in bits, and each extra bit doubles the number of possibilities, directly boosting resistance to brute-force attacks. For example, a password created from 20 random characters from a full set of symbols yields about 131 bits of entropy, equating to roughly 2^131 possible combinations—effectively impractical to brute-force. PRNGs are generators that mimic randomness but are deterministic with a given seed; certificates are digital documents linking identities to keys; wildcard domains are DNS patterns. The concept described here is entropy.

Entropy measures how unpredictable a secret is. The more entropy, the larger the possible space of values, which makes brute-force guessing far harder. This measure is expressed in bits, and each extra bit doubles the number of possibilities, directly boosting resistance to brute-force attacks. For example, a password created from 20 random characters from a full set of symbols yields about 131 bits of entropy, equating to roughly 2^131 possible combinations—effectively impractical to brute-force. PRNGs are generators that mimic randomness but are deterministic with a given seed; certificates are digital documents linking identities to keys; wildcard domains are DNS patterns. The concept described here is entropy.