What popular encryption algorithm requires that both the sender and receiver know a pre-shared key?
- PKI
- MD5
- AES
- HMAC
Explanation: MD5 is a hashing algorithm that guarantees that no one intercepted the message and altered it. Advanced Encryption Standard (AES) is a popular symmetric encryption algorithm where each communicating party needs to know the pre-shared key. Public key infrastructure (PKI) is an asymmetric encryption algorithm based on the assumption that the two communicating parties have not previously shared a secret key. HMAC is a hash message authentication code that guarantees that the message is not a forgery and actually comes from the authentic source.
Exam with this question: Modules 15 - 17: Cryptography Group Exam Answers
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