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QUESTION
When a user needs to provide message authenticity, in the absence of a secure channel, what options may be the best?
When a user needs to provide message authenticity, in the absence of a secure channel, what options may be the best?
A) Send a digital signature of the message to the recipient
B) Encrypt the message with a symmetric algorithm and send it
C) Create a checksum, append it to the message, encrypt the message, then send it to the recipient
D) Encrypt the message with a private key so the recipient can decrypt with the corresponding public key
