qrlogin

qrLogin is an authentication system based on the reading of the qr code by the mobile phone and the transfer of authentication data via the http/https protocol to the application or to a web resource.
The mobile application qrLogin by reading of a specially generated qr-code allows:
To authenticate on a web resource or in an application; 
To subtract and save account data; 
To subtract the credentials of the new account, generate a password or key and send these data to the server to complete the registration of this account. 
qrLogin is the unique thing you need to enter the web page.
To log in to the web resource, run qrLogin and scan the qr-code in the form of authentication on the web page or in the application.
<h3>qrLogin app</h3>
Secure storage of passwords; 
Support for OTP passwords; 
Ability to generate passwords and OTP keys in the application; 
Secure export / import of database of accounts with encryption of secret data; 
Ability to authenticate on the resource even if there is no Internet connection; 
Adding a new account by scanning of qr-code; 
Protection of access to the program and authentication data using a fingerprint or PIN options; 
Support for Android and iOS devices; 
Absolutely free full-featured version for Android and iOS; 
Simple integration with web resources and applications. 
To operate with this authentication system the web resource needs only to place the following qr-code that contains the URL for authentication and a unique session identifier in the authentication form. The mobile application will open the specified URL and will pass authentication data.

qrLogin

qrLogin is an authentication system based on the reading of the qr code by the mobile phone and the transfer of authentication data via the http/https …

Dennis

The QR Code Tag plugin creates QRCodes for your blog.
Features:
<ul>
<li>Choose your QR Code generator: Google Chart API (online connection required) or QR Code Lib (included)</li>
<li>Uses cURL if <code>allow_url_fopen</code> is disabled (Google Chart API) </li>
<li>GIF, PNG or JPEG image output</li>
<li>All QR Code images are cached</li>
<li>Use as a Sidebar Widget</li>
<li>Use the Shortcode <code>[qrcodetag]content[/qrcodetag]</code> within your posts</li>
<li>Use the Tooltip mode <code>[qrcodetag tooltip="content"]some text[/qrcodetag]</code> within your posts</li>
<li>Use the PHP function inside your own template</li>
<li>“Best Read Mode” for optimized QR Code image size</li>
<li>Works with PHP 5.3 as well</li>
<li>Works on symlinked plugin folders</li>
<li>Available plugin admin interface languages: English, German</li>
</ul>
<h3>Demo</h3>
See <a href="http://www.spreendigital.de/blog/2009/09/18/essential-android-applications/" rel="nofollow ugc">this blog entry</a> for a tooltip mode demo. 
Move your mouse over the application links.
<h3>Acknowledgements</h3>
This WordPress QR Code Tag Plugin is partly based on <a href="https://wordpress.org/extend/plugins/super-cool-qrcode/" rel="ugc">Super Cool QRCode Widget</a> by <a href="http://www.incerteza.org/blog/" rel="nofollow ugc">Matias S.</a>.
It uses:
<ul>
<li><a href="http://code.google.com/intl/de/apis/chart/" rel="nofollow ugc">Google Chart API</a> for online code creation</li>
<li>Y. Swetakes <a href="http://www.swetake.com/qr/index-e.html" rel="nofollow ugc">QR Code Library</a> for code offline creation</li>
<li>J. Zaefferers <a href="http://docs.jquery.com/Plugins/Tooltip" rel="nofollow ugc">jQuery Tooltip Plugin</a></li>
</ul>

QR Code Tag

Uncaught TypeError: $(...).tooltip is not a function

creates lots of errors with new wp

Use QR Codes (Google API or QR Code Lib) anywhere in your blog, as a Widget, Shortcode, Tooltip or with a PHP function.

qrLogin vs QR Code Tag