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 Post subject: Simulate Yubikey Touch
PostPosted: Mon Sep 06, 2010 12:52 pm 

Joined: Mon Sep 06, 2010 12:37 pm
Posts: 1
Hi All,

We are trying to find out if there is any option to simulate Yubikey Touch button so that OTP can be generated without user intervention. Basically the intent is to provide a seamless user experience by triggering the OTP generation process automatically. Came across "ykFLAG_ALLOW_HIDTRIG" flag which means "Allowing trigger by CAPS and NUM" in the "ykFlagProperty" of IYubiKeyConfig methods from COM Integrators guide.

Is this property required to be set when trying to trigger OTP generation by simulating the Yubikey touch functionality? Let us know if there are other APIs which can be used to achieve this.

Any help of suggestion would be appreciated.


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PostPosted: Wed Oct 06, 2010 8:54 am 

Joined: Tue Nov 03, 2009 10:16 am
Posts: 8
Location: the Netherlands

I kinda hope that this can't be done. I wouldn't like some software to push my buttons... Normally I'm not going to use up all 60000+ keys, but a small app could do that pretty quickly. The first yubikey DoS-worm would be around in no time if this can be done.

But maybe I'm missing something here....

Be following this thread...

Kind Regards,

Willem Kossen

Willem J. Kossen MSc.

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PostPosted: Sat Oct 30, 2010 1:26 am 
Site Admin
Site Admin

Joined: Wed May 28, 2008 7:04 pm
Posts: 263
Location: Yubico base camp in Sweden - Now in Palo Alto
We have deleted that feature, which we had in Yubikey 1.x. Partly for security reasons (although anyone who don't like it could turn it off) but also for compatibility reasons. This function really functioned on Windows platforms only.

Without knowing the needs in details, have you considered the new challenge-response functionality, provided by firmware version 2.2 ? Here, you can programmatically send a challenge to the Yubikey and optionally wait for the user to press the key. The challenge is then processed by the Yubikey and you get a response back. This however, contrary to the general Yubikey paradigm, requires client-side drivers.

We have deployed a Windows library and some sample applications to test these features out. Please check it out at


There, installers and user guides form the Client- and Server APIs can be downloaded for evaluation.


Hardware- and firmware guy @ Yubico

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