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Updated 20. august 2024 In part 1, I explained why encrypted messengers are important. In this part, we will look at particular messengers and compare them. Signal Let’s start with probably the…

Recently, there have been some fairly major improvements in the encryption of our communications. Virtually all websites have switched to encrypted communication using the https protocol. If we go to an unencrypted…

The best way to support the local crypto economy is to create a local small-world network. If you want to buy bitcoin for $100, your best bet is to get hold of…

When Buckminster Fuller was asked by a student during a lecture about the possibility of becoming an astronaut, he replied: “You don’t understand, you’ve been an astronaut for a long time. We…

Many of you know the problem – you run a Raspberry Pi under your desk, which closes your window blinds, takes care of your photos and monitors the humidity of your house.…

Non-crypto payment networks such as credit cards are tied to a name. Often a billing address is required, which is sometimes verified. Since payment card security is based on knowing a few…

Update, August 2026: Hacktrophy is no longer operating and the project has been discontinued. Last year, for several days, the world has been anxiously watching the election of the US President. In…

As a teenager, I founded one of the first, if not the first Czechoslovak web e-zine (today it would be something like a blog). It was called Netáčik. Later I started writing…

Finally, people are thinking about cloud societies, network states and parallel communities as a real alternative to current doctrine of democratic statism. There are many societal institutions required to pull it off…

This video is part of my course Lightning network for private bitcoin payments among friends and for products and services Phoenix Wallet homepage