- the private key of the retailer
- the digital signatures
- the unique shared secret known only by the retailer and the customer
- the public key of the retailer
Explanation: Digital signatures, generated by hash function, can provide the service for nonrepudiation of the transaction. Both public and private keys are used to encrypt data during the transaction. Shared secrets between the retailer and customers are not used.
More Questions: CCNA Cyber Ops Chapter 9 Exam Answers