Which of the following represents a factor that could compromise confidentiality?

USB drives can represent a factor that could compromise confidentiality because they are portable storage devices that can easily be lost, stolen, or misused. If sensitive data is stored on a USB drive and it falls into the wrong hands, unauthorized individuals could access that information, leading to a breach of confidentiality. Additionally, USB drives can be used to transfer data between systems, making it possible for malicious actors to exfiltrate sensitive information if proper security measures are not in place.

In contrast, firewalls and VPNs are security measures designed to protect data confidentiality. Firewalls filter incoming and outgoing traffic to safeguard the network, while VPNs encrypt data transmitted over the internet, ensuring privacy and security during communication. Access logs are used to monitor and record access to resources, providing insight into who accessed what information and when, which supports accountability rather than compromising confidentiality.