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GATE | GATE 2017 MOCK II | Question 65

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In public key and private key cryptography, host ‘A’ has PuA and PrA, host ‘B’ has PuB and PrB as public and private keys respectively. Now, if ‘A’ wants to send a message to ‘B’ securely, which key will be used by ‘A’ for encryption ?
(A) PuA
(B) PuB
(C) PrA
(D) PrB


Answer: (B)

Explanation: If the message is encrypted using PuB, then it can be decrypted using only PrB, which will be
known only to ‘B’.

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Last Updated : 28 Jun, 2021
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