AuthenticatorChooser

🗝️ Background program that skips the phone pairing option and chooses the USB security key in Windows FIDO/WebAuthn prompts.

WindowsSystem ToolsOpen source

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About

AuthenticatorChooser is a background program for Windows that selects a USB security key during FIDO and WebAuthn authentication prompts. It bypasses the phone-pairing option so users can use the connected USB key instead.

The software is intended for Windows users who authenticate with USB security keys and encounter prompts offering phone pairing as an alternative. Its focused purpose is to change the authenticator choice presented in these Windows security prompts.

AuthenticatorChooser is open-source Windows software. MirrorNest distributes the official build directly from its own storage and scans it for malware before publishing.

Architecture: x64

What's new in v0.5.0

Features - #30: Optionally automatically submit the USB security key PIN dialog after a customizable number of characters have been typed, which is more convenient than having to press Enter at the end. - Enable with the argument --autosubmit-pin-length=5, where 5 is the length of your PIN. - Thanks @felipecrs for suggesting this. Fixes - #36: Change the detection algorithm for the style of FIDO dialog box (23H2 or 25H2) to avoid comparing UI label strings which can collide across multiple dialog boxes in some languages, causing incorrect behavior. Instead, use an automation IDs that happens to have unique values per OS version. - Thanks @AlanIWBFT for reporting this. - #44: Force this program to always run as administrator, because the Windows 11 2026-01 Security Update raised the integrity level of the Windows Security dialog box process - If you had already set this program to autostart when you log in to Windows, that may silently fail now because Windows refuses to show UAC prompts for startup programs. To fix this, run AuthenticatorChooser --autostart-on-logon once more, which converts the registry autorun into a scheduled task. - Thanks to @Nono-m0le for reporting this, and @AFulgens, @DennisGaida, @felipecrs, @danofnz, @AshtonKnight, and @NETertainer for experimenting with and testing solutions.

Details

PlatformWindows
CategorySystem Tools
LicenseOpen source
PricingFree
Package IDAldaviva.AuthenticatorChooser
AuthorAldaviva
Latest versionv0.5.0
File typeZIP
Architecturex64
File size1.4 MB
Published9/25/2026

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