Every blog post that took off on Hacker News, ranked by the votes of its best submission. 1,615 posts.
You may have already heard that the Galileo EU satellite navigation constellation is out of service since last Thursday July 11th. Currently the Galileo constellation status page shows that the status of most Galileo satellites is not usable because of a service outage. The satellites not affected by this outage are…
The Problem Video playback looks better with a higher scan rate. A lot of content that was designed for TV (EG almost all historical documentaries) is going to be 25Hz interlaced (UK and Australia)…
While traveling through Dulles Airport last week, I noticed an Internet oddity. The nearby AT&T hotspot was fairly fast—that was a pleasant surprise.
Two communicating processes on a single machine have a few options. They can use regular TCP sockets, UDP sockets, unix domain sockets, or shared memory. A recent project I was working on used Node…
Supply chain security is an insurmountably hard problem. The recent focus is on Chinese 5G equipment, but the problem is much broader. This opinion piece looks at undersea communications cables: But now the Chinese conglomerate Huawei Technologies, the leading firm working to deliver 5G telephony networks globally…
What is QUIC protocol and how does it work ?
This is another post that started after several toots on mastodon. Most of the things presented here were already tooted by other people, but I think this is a good chance to write a mini tutorial about what to look at. We’ll use DNS, whois, BGP and your favourite search engine. What is DNS4EU? To quote the web page…
There are four types of mobile internet connection: 2G, 3G, 4G and 5G. We compare the real-world impact in terms of speeds and download times.
One of the things that came up at the HTTP Workshop was “distributed HTTP” — i.e., moving the Web from a client/server model to a more distributed one. This week, Brewster Khale (of Archive.org fame) talked about similar thoughts on his blog and at CCC. If you haven’t seen that yet, I’d highly suggest watching the…
If someone was making a list of the most important American companies today, it’s unlikely AT&T would be anywhere near the top.
Today’s Washington Post has a story entitled “Johns Hopkins researchers poke a hole in Apple’s encryption”, which describes the results of some research my students and I have bee…
In case you were wondering whether this would mean... writing zone files with some arcane syntax that BIND 9 is apparently famous of, I hereby present the main point of this post a recommendation for which DNS server to choose.
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I recently migrated my self-hosted services from a VPS (virtual private server) at a remote data center to a physical server at home. This change was motivated by wanting to be in control of the hardware and network where said services run, while trying to keep things as simple as possible. What follows is a…
Explore and join the Movim network
Crystal radios are famous for doing something almost magical: picking up broadcast signals with nothing more than a diode, an antenna, and a pair of headphones. They’re the simplest RF receivers yo…
How I received the signal of MANY satellites with an RTL-SDR V3
I've studied a lot of chips from the 1970s and 1980s, so I usually know what to expect. But an Ethernet chip from 1982 had something new: a ...
Secret NSA documents showed that NSA pushed DES in the 1970s to "drive out competitors" while knowing that DES was "weak enough" to break; meanwhile NSA publicly claimed that it would use DES . NSA used export-law exceptions in the 1990s to entrench RC4 and RSA-512, causing security problems for decades . NSA in the…
