Windows Login By Android Device Authentication via Bluetooth

About BthLogon

BthLogon is a credential provider that signs you in to Windows by authenticating your Android devices. Select BthLogon in the login screen and you find the screen locked and waiting for a valid device to connect. On your Android device, enter PIN in BthLogon app and tap on [Login] button. This will initiate the wireless device authentication. Once your device is authenticated, the screen will switches to the username/password authentication.


If your Android app is configured to hold your Windows credential, you will be automatically signed in once the screen is unlocked. You do not have to know your username / password or type anything on the keyboard without compromising security; your account can be protected by too a complex password for you to remember.

BthLogon Security

Since Bluetooth communication is wireless whose signal could reach any nearby devices, it must be secured the same way as Internet. This is especially so with BthLogon which could wirelessly transfer user credentials. BthLogon draws upon the industry standard security measures for data protection.


BthLogon and an Android device must have their public keys signed by each other's private keys. They authenticate each other by verifying the signatures before data exchange. Their commucation is secured by sharing a key by DH protocol. Each Android device must be configured by BthLogon system


key pair key pair
public key
----------------------------->
signed by the private key
receives the signature
<-----------------------------
signed by the private key
<-----------------------------
public key
----------------------------->
receives signature

Remote Desktop Support

You can sign in to a remote computer with BthLogon installed using an Android device at the client side. The remote desktop plugin communicates with the device via Bluetooth and relays the packets to and from the remote server.


<----->
RDT Server RDT Client Bluetooth Android Device

Supported OS

Android OS 5.0 or later
Windows OS Windows 8/10(32/64bit)

PC without Bluetooth embedded must have a Bluetooth adapter installed and it must work with Microsoft supplied Bluetooth driver. Will not work with BlueSoleil

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