Wie man Zwei-Faktor-Authentifizierung implementiert

Zwei-Faktor-Authentifizierung kann auf einfache Weise mit dem zeitbasierten Einmalpasswort-Algorithmus auf jedem Webserver implementiert werden. Diese standardisierte Methode ist als zusätzliche Sicherheitsmaßnahme für Logins weit verbreitet und benutzt Smartphone-Apps wie den Google oder Microsoft Authenticator als zweiten Faktor.

25.08.2021|Browser, HTML5, PHP, Web Design|

How to run Linux GUI applications on Windows 11

It's been a while since my last post about running Linux GUI applications on Windows 10. Meanwhile, Microsoft proposed its roadmap to bring GUI applications to the Windows Subsystem for Linux and now a preview is available. This project aims to enable support for running Linux GUI applications on Windows in a fully integrated desktop experience.

Augmented Reality with Chrome: Let Flowers Grow!

With Chrome 81 Beta for Android, it’s now possible to use immersive Augmented Reality in the browser. I have again created two variations of the original demo source code to show what is easily possible. You can now walk around the earth, having a closer look, and (hopefully) spread joy by placing flowers wherever you like.

15.02.2020|AR, Augmented Reality, Chrome, HTML5|

A minimal Web Push example

Web push notifications allow users to opt-​in to asynchronous messages from a server to a web application. The message can be sent at any time, even when the web application or the web browser is inactive. This W3C standard, based on the HTTP/2 protocol, is now supported by Chrome, Firefox, Edge, Opera, and Safari – but not by iOS.

08.02.2020|Browser, Cloud, JavaScript, Progressive Web App, PWA, Web Design|

An Alexa skill for New York City transport service changes

Playing around with the idea of Alexa Skills based on live data feeds, I created an Alexa Skill which announces unplanned service changes of the New York City subway and bus lines, based on information provided by the Metropolitan Transportation Authority (MTA). This skill, available in English and German, was now certified and has gone live.

21.01.2020|Alexa Skill, Amazon Echo, AWS, Node.js, TypeScript, Voice Assistant|

Why not to abbreviate the year 2020

The year 2020 poses a special problem that can make it easy for scammers to forge handwritten documents. This happens once in a century, the last time in the year 1919. It’s common practice to shorten the year when writing down a date. This year, however, could cause some legal issues and can leave you at risk of fraud.


Chrome 79 Beta: Virtual Reality Comes to the Web

Chrome 79 Beta is out and with it the public support of the WebXR Device API. This API is about accessing virtual and augmented reality devices. One usable device is in your pocket or lying next to you on the desk or you are even reading this blog post with it: your mobile phone. So let’s play around a bit and see what can be done.

08.11.2019|AR, HTML5, VR, WebGL, WebXR|

What web can do: a mobile speech-to-speech translator

In the 70s and 80s, some people thought that you could soon travel the world with a portable computer, only the size of a backpack, that would translate any spoken utterance to any other language. Nowadays, with the Google Translate App, you can easily do this with any mobile device. But is this also possible using only HTML, CSS, and Javascript?

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