!!! Overview
[{$pagename}]
!! Support for [{$pagename}]
There is limited [Website] or other on-line server support for [{$pagename}].

[Universal Second Factor] Security Keys are supported by [Google] [Chrome] since version 40 and [Opera] since version 40. [Universal Second Factor] security keys can be used as an additional method of two-step verification on online services that support the [U2F] [protocol], including 
* [Google]
* [Dropbox]
* [GitHub]
* [GitLab]
* [Bitbucket]
* [Nextcloud]
* [Facebook]
However, several of these only support is currently only available for the Chrome browser. [{$pagename}] is not widely supported in general.[3] 

!! [Universal Second Factor] and [Credential Enrollment]
The typical [user] will not be able or willing to perform [Credential Enrollment] using [Universal Second Factor]. The process involves several steps and the steps are not something the typical user would perform. Some of these include:
* Enrollment of the [Universal Second Factor] device.
* Fears about loss or unavailability of the [Universal Second Factor] device.
* Backup Codes

!! Backup Codes
When using any [Authentication Factors] there need to be a [Credential Management] method. What we have experienced with [Universal Second Factor] has been:
* Use an different [Authentication Factor] to obtain access to the account. So often you have a [One-Time Password System] as an [Authentication Factor]
* A set of one-time backup authentication codes 

The issues with the a set of one-time backup authentication codes is that either the person is unwilling or unable to save the codes in a Secure location or they are unable to obtain access or find them when needed. To store them in a secure place, requires some tool similar to a [Password Management Application], which is the kind of thing we are trying to eliminate.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
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* [#1] - [Universal_2nd_Factor|Wikipedia:Universal_2nd_Factor|target='_blank'] - based on information obtained 2017-04-02
* [#2] - [Smart Card Technology and the FIDO Protocols|https://www.securetechalliance.org/wp-content/uploads/FIDO-and-Smart-Card-Technology-FINAL-April-2016.pdf|target='_blank'] - based on information obtained 2016-05-21
* [#2] - [USB-Dongle Authentication|http://www.dongleauth.info/|target='_blank'] - based on information obtained 2017-03-21