So option B is correct na

7 votes

Hashed message is signed by a sender using

- his public key
- his private key
- receiver’s public key
- receiver’s private key

20 votes

Best answer

2 votes

In cryptography, a keyed-**hash message** authentication code (HMAC) is a specific type of **message**authentication code (MAC) involving a cryptographic**hash** 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)