Portable CAC Reader Options

Portable CAC readers let you authenticate from anywhere—hotel rooms, coffee shops, or temporary workspaces. This guide covers the best compact options for travelers and mobile workers who need CAC access on the go.

What Makes a Reader Portable?

The best travel readers share these characteristics:

• Compact size: Fits in laptop bag or pocket
• Protective design: Card slot protected during transport
• Durable construction: Withstands the rigors of travel
• No driver installation: Works immediately on any computer
• Short or retractable cable: Less tangling

Top Portable CAC Readers

Identiv SCR3500 A (SmartFold)

Best Overall Portable Reader

The SCR3500 features a folding design that covers the card slot when closed, protecting it from dust and damage in your bag.

• Folds flat for storage
• CCID compliant—no drivers needed
• Integrated cable management
• Works with Windows, Mac, and Linux

Price: $25-35

Identiv SCR3310v2 (Micro)

Smallest Form Factor

The standard SCR3310 in its smallest configuration. Not specifically designed for travel but compact enough to work.

• Tiny footprint
• CCID compliant
• Affordable
• Universal compatibility

Price: $15-20

Cherry SmartTerminal ST-1144

Slim Profile Option

A thin reader that slides easily into laptop sleeves alongside your computer.

• Very thin design
• Reliable Cherry quality
• CCID compliant
• Reasonable cable length

Price: $25-30

ACS ACR39U-N1

Budget Travel Option

A compact, affordable reader that handles basic CAC needs while traveling.

• Compact form factor
• Low cost
• CCID compliant
• Lightweight

Price: $15-20

USB-C Portable Options

For laptops with only USB-C ports:

Identiv SCR3310v2 USB-C

The same reliable reader with a native USB-C connector—no adapter needed.

USB-C Adapter Solution

Alternatively, pair any USB-A reader with a quality USB-C adapter. Choose adapters that provide proper power delivery.

Mobile Device Options

Some portable readers work with smartphones and tablets:

Identiv SCR3500 Smart Card Reader for iPhone

Lightning connector version for iOS devices. Works with DoD-approved iOS apps.

USB-C Readers on Android

USB-C CAC readers work with some Android devices running apps that support smart card authentication. Check app compatibility before relying on this for work.

Travel Tips

Packing

• Keep the reader in a protective pouch or case
• Pack it where you can access it quickly at security
• Consider cable ties or velcro straps to manage the cord
• Carry the reader in carry-on luggage (don’t check it)

Before You Travel

• Test the reader on the laptop you’re bringing
• Verify certificates aren’t about to expire
• Know your PIN (don’t store it with your card)
• Have backup authentication methods if CAC fails

Hotel and Public Wi-Fi

• Always use VPN when accessing DoD resources
• Verify you’re on the correct Wi-Fi network (watch for honeypots)
• Consider mobile hotspot instead of hotel Wi-Fi for sensitive work
• Remove your CAC when not actively using it

International Travel

• Check that your destination allows CAC reader import
• Some countries have restrictions on cryptographic devices
• Inform your security office of international travel
• Be aware of shoulder surfing in public spaces

What to Avoid

• Readers without cable management: Tangled cables fray and break
• Exposed card slots: Collect dust and debris in bags
• Bluetooth readers: Security concerns and pairing complexity
• Unknown brands: Quality and security uncertain