ITPEC IP October 2025 Question 43
ITPEC IP October 2025 — Question 43 of 100
A is public-key cryptography, B is common-key cryptography, C is slow, and D is fast — this combination is option (c).
Public-key cryptography uses different encryption and decryption keys. The public key can be distributed openly, making key distribution easier, but its mathematical operations are relatively slow. Common-key cryptography uses the same shared secret for both operations; securely sharing it is difficult, while bulk processing is fast.
Answer (c)
Why not others:
- (a) and (b) reverse which method uses different versus identical keys
- (d) identifies the methods correctly but reverses their relative speeds
Key rule: Asymmetric keys simplify distribution but are slower; symmetric shared keys require secure exchange but encrypt data faster.
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