Final answer:
To enforce non-repudiation in an electronic data transfer, both `digital signatures` and `encryption methods` can be used.
The correct answer is D) Both A) and B).
Step-by-step explanation:
Non-repudiation in electronic data transfer refers to the ability to provide evidence that a transaction occurred between identified parties and prevent them from denying their involvement. To enforce non-repudiation, two key components are commonly used: digital signatures and encryption methods.
1. Digital signatures: Digital signatures provide a way to verify the authenticity and integrity of electronic documents or messages. They are created using cryptographic algorithms and involve the use of a private key to sign the document or message. The recipient can then use the corresponding public key to verify the signature. Digital signatures provide non-repudiation because the signature is unique to the sender, and any tampering with the document will be detected during the verification process.
2. Encryption methods: Encryption is the process of converting data into a form that is unreadable to unauthorized parties. In the context of enforcing non-repudiation, encryption can be used to protect the contents of the electronic data transfer. By encrypting the data, only the intended recipient with the correct decryption key can access and read the information. This ensures that the data cannot be tampered with or altered during transmission, providing a level of non-repudiation.
Therefore, option D) Both A) and B) is the correct answer.