Much more than simple photo ID badges, most military IDs now come in the form of a Common Access Card, an advanced smartcard that serves a number of unique purposes.

Common Access Card

New ID card technology has allowed the military to add sophisticated functionality to its ID card program. Today, members of the military receive a Common Access Card (or CAC) which includes several types of technology; a barcode, magnetic stripe, and embedded smart chip. The Common Access Card is now the standard form of identification for active members of the military, reserve personnel, members of the National Guard, civilian military employees, as well as eligible contractors.

Along with general identification, the cards provide secure access control for military buildings and restricted areas, as well as computer networks. Many government Web sites require the use of Common Access Cards for authentication. Additionally, the cards can be used for securely encrypting email messages, and signing documents electronically.