Department of Defense (DoD) Cyber Awareness Practice Exam 2025 - Free Cybersecurity Practice Questions and Study Guide

Storing your Common Access Card (CAC) or Personal Identity Verification (PIV) card in a shielded sleeve provides optimal protection against unauthorized access and potential compromise. These sleeves are designed to block signals that could be used to remotely read the card’s information, effectively safeguarding against electronic pickpocketing and unauthorized scanning.

This method of protection ensures that the sensitive information contained within the card—such as personal identification details and cryptographic keys—remains secure from both physical and digital threats. It is essential to treat these cards with care as they contain vital information that can be exploited if the card falls into the wrong hands.

The other choices highlight less secure practices. Leaving a card in an unattended location, for instance, increases the risk of theft or loss, and keeping it on your desk disregards the necessity for safeguarding sensitive materials. Sharing the card, even with authorized personnel, poses a risk of misuse or unintentional exposure, as authorized access doesn't guarantee that the card will remain secure at all times. Using a shielded sleeve is thus the most proactive and responsible way to protect your CAC or PIV card.