A customer service representative needs to verify a customer's private information, but the representative does not need to see all the information. Which technique should the service provider use to protect the privacy of the customer?

Hashing transforms data into a fixed-size string of characters, which cannot be reversed to retrieve the original information. While it secures data integrity and enables verification, it does not allow any part of the original information to be seen, making it unsuitable for scenarios where partial visibility is required, such as customer verification.

Tokenization replaces sensitive data with non-sensitive equivalents, or tokens, that can be mapped back to the original information. Although it enhances security, it typically requires access to the tokenization system to retrieve the original data, which is not ideal for situations where the representative only needs to verify information without fully accessing it.

Encryption secures data by converting it into a coded format that can only be decrypted with a specific key. While it protects data from unauthorized access, it does not allow for selective visibility of the original information, making it less practical when partial data disclosure is needed for verification purposes.