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This is a private blog by Jens Lechtenbörger.
OpenPGP key: 0xA142FD84
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About 18 months ago, I asked: Do you teach or educate? I continue to use and develop emacs-reveal, a FLOSS bundle to create HTML presentations based on reveal.js as Open Educational Resources (OER) from Org mode source files in GNU Emacs. Last time, I mentioned license attribution for OER figures as tedious challenge, which I […] 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 […] 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 […] 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 […] 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 […] 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, […] 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 […] 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 […] 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 […] 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, […] |
