ISRO2007-71

Question

Hashed message is signed by a sender using

• A. his public key
• B. his private key
• C. receiver’s public key
• D. receiver’s private key

Answer 1

The private key is the only one that can generate a signature that can be verified by the corresponding public key.

Comments

So option B is correct na

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yes , answer is option B , as it is using digital signature.

Answer 2

In cryptography, a keyed-hash message authentication code (HMAC) is a specific type of messageauthentication code (MAC) involving a cryptographichash function and a secret cryptographic key. It may be used to simultaneously verify both the data integrity and the authentication of a message, as with any MAC

Sender has to encrpyt the data with its own private key, so at the receiver end he is capable to extract data using sender public key...

(B)