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Cryptnox compact USB mini smart card reader for hardware wallet and FIDO2 cards
Cryptnox mini USB smart card reader with card inserted showing secure connection
Cryptnox mini USB smart card reader rear view showing compact portable design
Cryptnox compact USB contact smart card reader plugged into laptop

Cryptnox SA

Cryptnox USB Smart Card Reader — for FIDO2, eID, PIV, and CAC Cards

The Cryptnox USB-A smart card reader is a compact, standards-based reader for FIDO2 security cards, government eID (German Personalausweis, Spanish DNIe, Italian CIE, Belgian eID, Estonian eID), U.S. PIV cards, U.S. DoD Common Access Cards (CAC), and any standard ISO 7816 contact smart card. Plug-and-play on Windows, macOS, and Linux.

CHF 17.74

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Description

The Cryptnox CAC reader is a compact USB-A smart card reader purpose-built for the U.S. Department of Defense Common Access Card (CAC), federal PIV cards, and FIDO2 contact-interface security cards. Pocket-sized and plug-and-play on Windows, macOS, and Linux, this CAC reader follows the same ISO 7816 + USB CCID + PC/SC 2.0 standards the entire Common Access Card infrastructure is built on — no Cryptnox-specific drivers required.

Is a CAC reader the same as a USB smart card reader?

In practical terms, yes. A Common Access Card is a standard ISO 7816 contact smart card with PKI certificates loaded onto it. Any USB CCID-compliant smart card reader can read a Common Access Card — whether it’s marketed as a “CAC reader,” a “PIV reader,” or simply a “USB smart card reader.” The Cryptnox CAC reader is a standards-based reader optimized for CAC, PIV, and FIDO2 workflows on the most common DoD and federal-civilian software stacks. That said, not every USB smart card reader on the market handles every operating system smoothly — Cryptnox is built on the same Swiss-engineered firmware as our FIDO2 cards, with a documented driver-free install path on Windows, macOS, and Linux.

Looking for a different reader?

For NFC contactless workflows (FIDO2 over NFC, MIFARE access badges), see the Cryptnox NFC Contactless Reader. For USB-C native with full-size + SIM dual-slot support, see the Cryptnox Smartcard Reader. To pair this Common Access Card reader with a Cryptnox FIDO2 security card for combined CAC + FIDO2 authentication, browse our FIDO2 lineup.

For setup walkthroughs and reader configuration guides, browse our card reader tutorials hub.

Features

Built for CAC, PIV, and CIV cards

Whether you’re a service member, DoD civilian employee, federal contractor, or anyone needing a reliable Common Access Card reader for daily desktop login, this compact reader handles every standard contact smart card:

  • U.S. Common Access Card (CAC) — military email, OWA, NIPRNet, milConnect, DTS, ATAAPS, and any DoD website requiring CAC sign-in
  • U.S. PIV (Personal Identity Verification) — federal civilian agencies with GSA-approved PIV middleware
  • CIV (Common Identity Verification) — contractor identity cards
  • European eID — German Personalausweis, Estonian eID, Belgian eID, Italian CIE, Spanish DNIe
  • FIDO2 contact cards — including all Cryptnox FIDO2 security cards
  • Banking smart cards, OpenPGP, JavaCard development cards

Tested with the standard CAC software stack

  • DoD root CA bundle — required for CAC websites
  • ActivClient — standard PKI middleware on DoD-managed Windows
  • MilitaryCAC.com installer — community resource for personal-computer CAC setup
  • HID Identity Client, opensc-pkcs11 — alternative PIV middleware
  • Adobe Acrobat — for CAC-signed PDFs and S/MIME-signed email
  • Open-source stacks — pcsc-tools, OpenSSL with engine_pkcs11

Cross-platform plug-and-play

The Cryptnox CAC reader is a standard USB CCID class device — every modern operating system recognizes it via its built-in smart card stack:

  • Windows 10/11 — native Microsoft USB CCID driver
  • macOS 11+ — built-in CryptoTokenKit
  • Linux — pcscd + libccid + opensc packages (one-time install)

Specifications

Technical specifications

  • Interface: USB 2.0 Full Speed, USB-A connector
  • Card slot: single ISO 7816 contact slot (full-size CR80)
  • Standards compliance: ISO 7816, PC/SC 2.0, USB CCID, USB-IF certified
  • Card protocols: T=0, T=1
  • Operating systems: Windows 10/11, macOS 11+, Linux, ChromeOS (via Smart Card Connector)
  • Drivers: OS-native USB CCID class driver — no Cryptnox-specific driver required
  • Form factor: compact, pocket-sized USB stick design
  • Power: USB bus-powered, low draw — works without a powered hub

Compliance

  • USB-IF certified
  • PC/SC 2.0 standards compliant
  • ISO 7816 contact smart card standard
  • CE and RoHS marked

Frequently Asked Questions

Is this a DoD / military CAC reader?

Yes — it’s designed for U.S. Department of Defense Common Access Card (CAC) use, plus Personal Identity Verification (PIV) and Common Identity Verification (CIV) cards. It follows the same standards CAC infrastructure is built on: USB CCID, PC/SC 2.0, and ISO 7816. That means it works with DoD PKI, military email (Outlook/OWA with CAC), and any DoD website that requires CAC-based login, using the built-in smart card stack on Windows, Mac, and Linux — no Cryptnox-specific driver needed.

Does it work with Mac, Linux, and Chromebook?

  • Windows 10/11: plug-and-play, uses the built-in Microsoft smart card stack
  • macOS 11+: plug-and-play, uses built-in CryptoTokenKit (supports CAC / PIV login on Mac)
  • Linux: supported via the OS’s generic PC/SC stack (pcscd + CCID + OpenSC). These packages aren’t preinstalled on most distributions — install them first:
  • Debian / Ubuntu: sudo apt install pcscd libccid opensc pcsc-tools
  • Fedora / RHEL: sudo dnf install pcsc-lite pcsc-lite-ccid opensc pcsc-tools
  • Arch: sudo pacman -S pcsclite ccid opensc pcsc-tools
  • Chromebook: supported via the Smart Card Connector extension (built into ChromeOS since v67) for CAC-enabled web apps
  • iPad / iPhone: requires a USB-C iPad or the Apple Lightning-to-USB Camera Adapter; works with DoD mobile apps

My CAC reader isn’t working — what do I check first?

Most “CAC reader not working” issues are software, not hardware: (1) ensure you have DoD CA certificates installed (run MilitaryCAC’s installer on Windows, or download from PKI repository); (2) on Mac, install the smart card services for Military CAC from MilitaryCAC.com; (3) restart the smart card service (services.msc on Windows, sudo systemctl restart pcscd on Linux); (4) try the card in the contact slot facing up, gold chip first; (5) test with another CAC to isolate the card vs reader. If the reader itself is not detected as a USB device, try a different USB port and cable.

Does it support PIV, CAC, CIV, and European eID cards?

Yes — all are ISO 7816 contact smart cards and communicate with the reader via the same standardized protocol. The reader is just the hardware bridge; each card type also requires its own middleware or application on your computer to authenticate against the target system:

  • U.S. CAC (military/DoD) — PKI login, email signing, website auth. Requires the DoD root CA bundle plus ActivClient or the MilitaryCAC installer (Windows/Mac).
  • U.S. PIV (federal civilian) — requires GSA-approved PIV middleware (ActivClient, HID Identity Client, or opensc-pkcs11 on Linux).
  • CIV (contractor ID) — handled by the same PIV middleware.
  • European eID (German Personalausweis, Estonian eID, Belgian eID, Italian CIE, Spanish DNIe) — requires country-specific software (AusweisApp2, eID-client, eID Viewer, CIE tools, AutoFirma).
  • Cryptnox FIDO2 cards (via contact interface) — works through any FIDO2/WebAuthn-supporting browser or app.
  • OpenPGP smart cards, PIV-II, CardOS, JavaCard enterprise cards — each needs its own host software (e.g., GnuPG + scdaemon for OpenPGP, vendor tooling for CardOS).

The reader itself is standards-compliant and stays out of the way — no Cryptnox-specific driver or middleware is required.

Which DoD services and applications does this reader work with?

Any CAC-enabled service that uses the standard Windows / Mac / Linux smart card stack will work with this reader — the hardware side stays out of the way. Common use cases include:

  • Email & collaboration: DoD 365 (Outlook / Webmail / OWA), Microsoft Teams with CAC PIN login
  • Personnel & pay: myPay, DEERS, DTS (Defense Travel System), ATAAPS
  • Veteran & family services: VA.gov, eBenefits, milConnect, TRICARE Online
  • Contracting & procurement: WAWF, Procurement Integrated Enterprise Environment (PIEE), SAM.gov
  • Network / VPN access: Ivanti Connect Secure (formerly Pulse Secure), Cisco AnyConnect with CAC login
  • Document signing: Adobe Acrobat with CAC signing, digitally signed email (S/MIME)

On the software side you’ll need the DoD root CA bundle installed and, for full feature support on Windows/Mac, the ActivClient or MilitaryCAC installer. The reader itself needs no additional Cryptnox-specific software.

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