Which of the following is an example of a technical control?

Encryption is a prime example of a technical control because it involves the use of technology to protect data confidentiality and integrity. Technical controls refer to specific technological measures employed to safeguard information systems and data. They typically include mechanisms that are hardware or software-based designed to protect against unauthorized access or breaches.

In this context, encryption works by transforming readable data into a coded format that can only be deciphered with the correct decryption key. This ensures that even if data is intercepted, it cannot be understood by unauthorized users.

The other options, while important for overall security strategy, fall under different categories of controls. Background checks pertain to personnel security measures, security training is focused on educating employees about security practices, and policy development involves setting guidelines and procedures for organizational security, all of which are considered administrative or physical controls rather than technical controls.