Quickstart Guide — Idem Card 



1.1 Turning Power ON/OFF


Power ON

Touch the dark-blue area, and the blue light will be on

Power OFF

Touch the dark-blue area and keep touching for 9 seconds, Idem Card will be powered off​


1.2 Charging 

Idem Card can be charged by Idem Card charger. Attach charger to conventional 5V power adapter and insert Idem Card into the charger. ​ The green light and red light of Idem Card will be both on during charging. ​ When Idem Card is charged to full, green light will be on and red light will be off


1.3 Touch Behavior

Power on Idem Card

A simple one-touch to power on Idem Card when Idem Card is OFF 

Enter pairing mode

Touch the dark-blue area and keep touching for 3 seconds, and Idem Card will enter pairing mode

Power OFF

Power OFF under pairing mode​ When Idem Card enters pairing mode, touch the dark-blue area and keep touching for 6 seconds and Idem Card will be powered off​

Powers OFF Idem Card

Touch the dark-blue area and keep touching for 9 seconds, and Idem Card will be powered off

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1.4 LED Status Indicator

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There are 3 colors of LED indicator to present the status of Idem Card. 

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Bluetooth paring mode

Flashing every 0.3 seconds.

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BLE data transmission

Flashing every 0.1 seconds.

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Idem Card is powered on and not doing any action.

Blue LED is always ON.  


Idem Card is fully charged to 100%. 

Pairing is complete.

The battery is running out of power.

2.1 How to use for FIDO supported application

Idem Card can be used as a FIDO2 and U2F token on Windows, macOS, Android, and iOS devices.  

Idem card supports both FIDO2 and U2F. Many web services start to support FIDO2 Webauthn API and will replace U2F.  

  • System Requirement

Windows 10 Version 1903 or later


2.1.1 Pair Bluetooth device in Windows

To use BLE (Bluetooth) interface of Idem Card on Windows, user needs to pair Idem Card in system settings.  

Step 1

Go to Notifications-right click Bluetooth icon-Go to settings

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Step 2

Go to “Bluetooth & other devices” of Settings. And click “Add Bluetooth or other device”

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Step 3

FIDO2 PIN is optional and it is web service dependent, e.g. Microsoft account requires using FIDO2 PIN as mandatory.

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Touch Idem Card to power on it and keep touching 5 seconds.

Idem Card will enter pairing mode and you’ll see Idem Card device showed in the screen of “Add a device”.  

Step 4

Enter pairing code which is showed at back of Idem Card.  

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Step 5

Paired successfully.

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2.1.2 Manage Idem Card in Windows 

Step 1

Go to “Settings” → “Accounts” → “Sign-in options” and find the button “Manage” of “Security Key”. 

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Step 2

Touch to power on Idem Card when the following dialog is popped up. 

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Step 3

New (Add) Security Key PIN.

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2.1.3 Idem Card as FIDO2 Authenticator for Web Apps on Windows

FIDO2 Webauthn API is already fully supported on Windows. Table below is the FIDO2 support matrix. There’re web apps which can use Idem Card as FIDO2 authenticator over BLE/NFC interface on Windows and FIDO2 BLE/NFC interface (CTAP2 BLE/NFC) is not enabled in macOS.  


You will be directed to the selected application’s site to see the instruction.

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2.2 How to use for Computer login

Step 1. Get the Apps

GoTrust ID is available for macOS and Windows. Click icon below to download.

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Step 2. Pair with Computer

When GoTrust ID app on your computer is installed, you can start to pair your Idem Card and computer by following Instructions.


  1. Open GoTrust ID application on the computer.

  2. Before you start, make sure Bluetooth is turned on.

  3. On Windows computer, if you do not enable Windows Hello PIN before (it’s different from Security Key PIN), you need to set it up.
    You can find the configuration in System Settings->Sign-in Options -> Windows Hello PIN


  4. Click "START" on computer to start pairing.

  5. Touch your Idem Card and keep touching for 3 seconds till Blue LED flashing to enter pairing mode.

  6. When two devices link successfully, the computer will show a list of available devices, and choose your Idem Card on it.

  7. Enter BLE pairing code showed on the backside of Idem Card.

  8. Enter your Windows Hello PIN or Admin password (macOS).

  9. Pairing successfully.

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Step 3. Use Idem Card to Log in Computer

Explore the new login experience!

​After pairing success, you can log out the computer, and use Idem Card to unlock it without a password.



How is battery lifespan?

If you charge an Idem card one time per month, the battery will still have 80% of the original capacity after ten years. In other words, the operation time will be decreased by ~20%, but the battery will be still alive. However, if you charge an Idem card every day, the battery life cycle would be around two years. Therefore, please do not charge your Idem card frequently. If possible, please charge your Idem Card until the low battery indicator LED is flashing.

Can I use conventional smart card printer to print Idem Card?

No. We do not recommend using conventional card printer since there is battery in Idem Card and conventional card printer will cause high temperature which is harmful to battery. If you need to print, you can use UV printing which prints under normal temperature. GoTrust also provide service to print customized artwork on Idem Card for mass deployment. You can contact us (https://www.gotrustid.com/company?) for more detail.

Do I need to install any kind of driver to use FIDO2 with the Idem Card connected to browser?

Answer: If you use latest Windows 10 version 1903 or above, there’s no additional driver required. Latest Windows 10 already support FIDO2 over BLE and NFC natively.

How to change FIDO PIN of Idem card?

Latest Windows 10 version 1903 supports management of FIDO PIN. You can use management console in “Windows Settings” -> “Accounts” -> “Sign-in Options” -> “Security Key”.

Can Idem Card support PKI feature?

There is a PIV application installed in Idem Card. You can use any PIV compliant middleware such as OpenSC, Windows built-in minidriver, or macOS CryptoTokenKit to access PKI functions over ISO7816 or NFC interfaces.

Can I use FIDO2 of Idem Card on macOS?

Currently, browsers such as Chrome, Safari, and Firefox on macOS only support FIDO2 over USB interface. Please wait browsers to enable BLE and NFC functions.

Why does Idem Card run out of battery after a while without using it?

Idem Card will be in standby mode when you’re not using it.

Is Idem Card secure?

Yes. Idem Card is very secure. Idem Card embeds a secure element which is certified by Common Criteria EAL5+ and FIPS 140-2 Level 3. All cryptographic are handled inside the secure element and keys are stored in the secure element. Besides, Idem Card itself also certified by FIDO2 security level 1.

How do I use Idem Card for physical access?

Idem Card supports MIFARE Plus by default. GoTrust have other versions of Idem Card to support different physical access systems such as HID and FeliCa. You can contact GoTrust support (support@gotrustid.com) to get more detail.