Categories

OER figures with license meta-data in emacs-reveal

Do you teach or educate? Do you use somebody else’s educational resources or share your own creations?

As described last year, I created an infrastructure called emacs-reveal to produce HTML presentations as Open Educational Resources (OER) from Org Mode text files in GNU Emacs for my own teaching. If you believe in the values of [...]

HTML presentations as OER from Org mode with Emacs

This post has an exceptional topic given the main theme of my blog, but I’d like to advertise and share what I created during summer term 2017, supported by a fellowship for innovation in digital university teaching funded by the Ministry of Innovation, Science and Research of the State of North Rhine-Westphalia, Germany, and [...]

Privacy Story

The EFF is “collecting stories from people about the moment digital privacy first started mattering in their lives”. They also ask to share the stories on Twitter using the hashtag #privacystory. Here is my story, even if I’m not on Twitter. Feel free to share anyways, as usual under CC BY-SA 4.0.

I insist that [...]

GNU Emacs under Qubes OS

A few weeks ago I installed Qubes OS on my PC at work. The project’s self-description is as follows:

Qubes is a security-oriented, free and open-source operating system for personal computers that allows you to securely compartmentalize your digital life.

Essentially, under Qubes you run different virtual machines (VMs), which are more or less isolated [...]

You need Tor, and Tor is asking for your support

For decades, privacy and freedom of thought and expression have been valued as human rights. Please take a moment to read articles 12, 18, and 19 of ↑The Universal Declaration of Human Rights dating back to 1948.

In free, democratic countries we took those rights for granted. Even without knowing or caring about human rights, [...]

Firefox with Tor/Orbot on Android

In my previous post, I explained three steps for more privacy on the Net, namely (1) opt out from the cloud, (2) encrypt your communication, and (3) anonymize your surfing behavior. If you attempt (3) via Tor on Android devices, you need to be careful.

I was surprised how complicated anonymized browsing is on Android [...]

Three steps towards more privacy on the Net

Initially, I wanted to summarize my findings concerning Tor with Firefox on Android. Then, I decided to start with an explanation why I care about Tor at all. The summary, that I had in mind initially, then follows in a subsequent post.

I belong to a species that appears to be on the verge of [...]

I Love Free Software

Today is Valentine’s Day, which is a popular occasion to celebrate love. I love free software. In case you don’t know: Free software is software that respects our freedom, and I suggest that you take a close look.

Today I’d like to recommend a pair of nifty, lovely Android apps that I use on [...]

Certificate Pinning for GNU/Linux and Android

Previously, I described the dismal state of SSL/TLS security and explained how certificate pinning protects against man-in-the-middle (MITM) attacks; in particular, I recommended GnuTLS with its command line tool gnutls-cli for do-it-yourself certificate pinning based on trust-on-first-use (TOFU). In this post, I explain how I apply those ideas on my Android phone. In a nutshell, [...]

Certificate Pinning for GNU Emacs

GNU Emacs is where is spend most of my computer time. Using Emacs, I’m writing texts in general and this post in particular, I’m programming, I’m reading RSS feeds and news articles, I’m reading and writing e-mails. Emacs is highly customizable and extensible which is great, in general. However, in the past Emacs valued convenience [...]