Windows hello companion device app download

How to set a custom background image for Microsoft Edge on Windows August 30, Windows 11 Start Menu to get ability to create named folders soon Nisha - December 7, Go to mobile version. Loading Comments Email Required Name Required Website. Also, given that configuration data is stored by a Windows service, it is available to the Windows Hello companion device app across user profiles. The Windows Hello companion device app can call AbortRegisteringDeviceAsync to cancel the registration and pass in an error code.

The Companion Authentication Service will log the error in the telemetry data. A good example for this call would be when something went wrong with the Windows Hello companion device and it could not finish registration for example, it cannot store HMAC keys or BT connection was lost.

The Windows Hello companion device app must provide an option for the user to de-register their Windows Hello companion device from their Windows 10 desktop for example, if they lost their companion device or bought a newer version. When the user selects that option, then the Windows Hello companion device app must call UnregisterDeviceAsync. This call by the Windows Hello companion device app will trigger the companion device authentication service to delete all data including HMAC keys corresponding to the specific device Id and AppId of the caller app from PC side.

That is left for the Windows Hello companion device app to implement. The Windows Hello companion device app is responsible for showing any error messages that happen in registration and de-registration phase. The first call returns, among other things, a nonce that — once concatenated with other things - needs to be HMAC'ed with the device key stored on the Windows Hello companion device.

The second call returns the results of HMAC with device key and can potentially end in successful authentication i. It can also fail if an unregistered companion device app calls it. The second API call FinishAuthencationAsync can fail if the nonce that was provided in the first call is expired 20 seconds. For example, the second call must not be submitted until intent signal is available. In other words, the PC should not unlock if the user has not expressed intent for it.

To make this more clear, assume that Bluetooth proximity is used for PC unlock, then an explicit intent signal must be collected, otherwise, as soon as user walks by his PC on the way to kitchen, the PC will unlock. Also, the nonce returned from the first call is time bound 20 seconds and will expire after certain period. As a result, the first call only should be made when the Windows Hello companion device app has good indication of companion device presence, for example, the companion device is inserted into USB port, or tapped on NFC reader.

With Bluetooth, care must be taken to avoid affecting battery on PC side or affecting other Bluetooth activities going on at that point when checking for Windows Hello companion device presence. Also, if a user presence signal needs to be provided for example, by typing in PIN , it is recommended that the first authentication call is only made after that signal is collected.

The Windows Hello companion device framework helps the Windows Hello companion device app to make informed decision on when to make above two calls by providing a complete picture of where user is in authentication flow. Windows Hello companion device framework provides this functionality by providing lock state change notification to app background task.

Windows Hello companion device apps should only call the two authentication APIs in the first two states. Windows Hello companion device apps should check for what scenario this event is being fired. There are two possibilities: unlock or post unlock. Currently, only unlock is supported. In upcoming releases, post unlock scenarios may be supported.

When the Windows Hello companion device app registers the first companion device, it should also register its background task component which will pass authentication information between device and companion device authentication service. The Windows Hello companion device framework is responsible for providing feedback to the user about success or failure of signing in.

The Windows Hello companion device framework will provide a stock of localized text and error messages for the Windows Hello companion device app to choose from. These will be displayed in the logon UI.

Call this API when an intent signal is available. Note that an intent signal must always be collected on the Windows Hello companion device side. Guidance messages are designed to show the user how to start the unlock process. These messages are only shown to the user once on the lock screen, upon first device registration, and never shown there again. These messages will continue to be shown under the lock screen.

Error messages are always shown and will be shown after an intent signal is provided. Given that an intent signal must be collected before showing messages to the user, and the user will provide that intent only using one of the Windows Hello companion devices, there must not be a situation where multiple Windows Hello companion devices race for showing error messages.

As a result, the Windows Hello companion device framework does not maintain any queue. When a caller asks for an error message, it will be shown for 5 seconds and all other requests for showing an error message in that 5 seconds are dropped.

Once 5 seconds has passed, then the opportunity arises for another caller to show an error message. We prohibit any caller from jamming the error channel. Subscription payments will be charged to your iTunes account at confirmation of your purchase and upon commencement of each renewal term.

For more information, please see our Terms of Service and Privacy Policy. Before you download please be aware. Microsoft has announced that after January it is downgrading the importance and ending future support for the Windows Hello Companion Device Framework.

If you have any questions regarding this notice, please send an email to support gotrustid. It feels a lot better to unlock windows on your wrist than using a phone. The following data may be collected and linked to your identity:. The following data may be collected but it is not linked to your identity:.

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