The QR code in your pocket has spent the night crumpled, taken a scratch from your keys, and a coffee stain has decided to settle right on one corner. Even so, at the supermarket checkout it scans on ...
At the door of a nightclub there is a bouncer with two questions: how old are you, and how can you prove it. The usual answer is to pull out your ID and show it, which also reveals your name, your add...
At the door of a nightclub there is a bouncer with two questions: how old are you, and how can you prove it. The usual answer is to pull out your ID and show it, which also reveals your name, your add...
99% of the internet travels along the ocean floor, but that cable has one countable limit: the last mile, the stretch between the exchange in town and your living room, is the most expensive path in t...
The subway car rumbles, the motor vibrates under your feet and the platform horn slips in through the window. Then you put on your headphones, press a button and the roar disappears as if someone had ...
Your phone, your laptop, the living-room TV and the “smart” coffee maker share something: each one needs its own address to talk on the internet. And those addresses are a finite resource....
When someone says “the call looks terrible”, they usually blame the carrier, the router or the laptop. The interesting part is what happened a few hundred milliseconds earlier: the softwar...
In 2026 anyone can play a 1996 title on a laptop, on a phone or even inside a browser. And there is a detail that rarely gets told: that machine does not understand the game’s code. It is not th...
Look at a video game scene: millions of triangles, light reflecting, smoke drifting. It looks like the graphics card is “drawing”. It is not: it is computing. Every pixel on your screen is...
Your SSD has no moving parts, yet it wears out all the same. Every time you write a piece of data, a flash memory cell moves a little closer to the end of its life. The question is not whether it will...
There is a program that runs inside the Linux kernel, the core of the operating system, without needing to reboot the server or touch the kernel’s own source code. It is called eBPF (extended Be...
In an artificial intelligence data centre there are cards that draw more than 700 watts, perform on the order of two thousand trillion floating-point operations per second and need liquid cooling to a...
In a large data center, disks fail every single day. It is not a catastrophe: it is routine. And yet when you open your photo folder in the cloud, everything is there. The usual explanation is that th...
On 31 December 2016, at 23:59:60 UTC, the world lived through a second that does not exist: nobody noticed, but the planet’s official clocks counted a 61-second minute. It was the twenty-seventh...
Two worlds that could not be more different live on the web. One is JavaScript, the language behind most of the sites you visit. The other is binaries: compiled programs that the browser executes dire...
Quantum computers have been a laboratory promise for decades, but cryptography is already preparing for them as if they were arriving tomorrow. That is not paranoia: in August 2024 the NIST (the US st...
Cold archiving is the industry’s awkward problem: data that must be kept for decades —medical records, satellite imagery, backups with legal value— is not consulted daily, yet cannot be deleted....
Every few years, Wi‑Fi doubles its speed, but no generation arrives with as much fine print as Wi‑Fi 7. The IEEE 802.11be standard, backed by the Wi‑Fi Alliance certification program, does not just ti...
The modern phishing kit no longer settles for cloning the login screen. Tools such as Evilginx or Tycoon 2FA stand up a reverse proxy between you and the real server: every keystroke, every six-digit ...
It sounds like an exaggeration, but it is true: when you send a message to someone across the ocean, it most likely travels thousands of kilometres along the seabed. Communications satellites account ...
You open your banking app, the address bar turns green and in under a second a 256-bit session key has been negotiated that not even the owner of the Wi-Fi network can decrypt. All that machinery —RSA...
You open your favourite series in 4K and barely notice a detail bordering on the impossible: the video you are watching travels down your fibre at about 15–25 megabits per second (Mbps). Run the numbe...
If you open a website hosted in Tokyo, your data does not take the most direct cable. It may well leave Madrid for Frankfurt, hop up to Amsterdam, cross the Atlantic along a path you never imagined an...
A 120 kW AI rack in 1.8 metres is more than air can carry. We go through the physics that caps fan cooling, the cold plates mounted on the chip, the primary and secondary loops separated by a CDU, and...
You unplug your SSD, put it in a drawer, and two years later you pull it out and plug it back in. Are your photos still there? The short answer is probably yes. The long answer hides the physics of NA...
Every time you write a line of code that creates an object, a list or a string of text, that data takes up RAM memory. At some point you stop using it, but the space it occupies is not freed by itself...
HTTP/3 is the third major version of the protocol that moves the web: the set of rules your browser and servers use to exchange pages, images and data. What you are reading right now has most likely t...
You press the power button and, on the surface, everything happens in an instant: a logo, a loading bar and the desktop. But in those seconds the machine runs a remarkably orderly protocol involving t...
When a program runs, it behaves as if it had access to a seemingly unlimited, contiguous and stable amount of memory. In reality it lives inside an illusion carefully orchestrated by the operating sys...