Final answer:
The telephone logs combined with the work schedule in the described scenario provide Nonrepudiation, establishing proof that the call was made by the specific person working at that time.
Step-by-step explanation:
Telephone logs that show a call was placed from a phone at a time when a person was the only one working provide Nonrepudiation. Nonrepudiation ensures that a person cannot deny the validity of something, in this case, making a phone call since the logs can be used as proof of the action. This evidence can be particularly important in legal and security contexts, where confirmation of actions by specific individuals is critical.
It is worth noting that nonrepudiation offers increased accountability because it prevents individuals from denying their actions, thereby providing a check against deceptive practices. In contrast, authentication is about proving one's identity, integrity entails maintaining the consistency and accuracy of data, and confidentiality is about preventing unauthorized access to information. The scenario provided does not mention these other aspects of information security, focusing instead on the proof of action that nonrepudiation provides.Based on the information provided, the telephone logs and time records offer authentication.Authentication verifies the identity of a user or system. In this case, the telephone logs and time records confirm that a call was indeed placed from a specific phone and that the person identified in the time records was the only one working at that timeAuthentication is important in ensuring the accuracy and trustworthiness of the information being recorded.