Before we explain what a CAC card reader, I should explain what a CAC. CAC stands for Common Access Card. It is a form of identification by the United States Department of Defense distributed to certain people who need them the people who have these cards:

- Active Duty Military Personnel
- Reserve Military Personnel
- National Guard members
- Department of Defense Staff
- Department of Defense Contractors

This is just a short list of people who are eligible to receive one of these cards. The identification is as a civil servant within the meaning of the Geneva Convention. The card is also use to access facilities by the military. It will also contribute to high-security Web sites within the Department of Defense to access the network. Calculate access is often controls with Common Access Cards. This pass is also valid information on an internal memory chip. This information is sometimes necessary distance, so the need for a CAC card reader.

A CAC Card Reader is a computer peripheral (a computer accessory), the possibility that information on the Common Access Card to decrypt and thus they are used by the user of the computer needs. This is often use when a person was sent overseas, where it is not possible, on a Department of Defense may have protected computer sign.

Most of the time they are purchased based CAC Card Readers PX, but may at a Best Buy or be bought a similar device. You may have to request them to show and potentially ID to prove preferably the Common Access Card, you will need. They are also available on the Internet. The government does not reimburse purchases of these readers in any situation.