ITPEC IP October 2021 Question 45
ITPEC IP October 2021 — Question 45 of 100
Four of the eight keys are not made public. Each of the four people has one public key and one corresponding private key. The four public keys may be distributed, while each person keeps their own private key secret, giving four non-public keys.
Answer (c)
Why not others:
- the number of secret keys equals the number of participants, not the number of pairs of participants
- one or two would leave some participants without a private key
- six would imply that only two of the four required public keys were published
Key rule: In public-key cryptography, every participant owns a key pair: one public key and one private key that must remain secret.
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