Agregátor RSS

Apple levným MacBookem Neo šlápl Microsoftu na citlivé místo. Ne proto, že by šlo o dokonalý notebook. Právě naopak: 8 GB RAM, 256GB SSD, dva porty USB-C a chybějící podsvícení klávesnice jsou v roce 2026 tvrdé kompromisy. Jenže za necelých 17 000 Kč je to pořád Mac. A to je pro svět levnějších ...

Linux security has traditionally depended on logs, metrics, and alerts. That model works well when systems behave predictably. Inputs come in, processes run, events get logged. Security teams can usually reconstruct what happened afterward without too much trouble.

OPINION There are three little words to make the heart beat faster in anyone who knows what they mean: critical infrastructure resilience. If you run that infrastructure or a country dependent on it, you need energy, communication and transport to be impregnable to cyber attacks. This is doubly so if that country is five minutes by incoming missile from an implacable hyper-competent enemy sworn to invade you. One that is building and equipping its military as fast as it can with this one thing in mind. One with the most invasive and brazen state hacking machinery on the planet. Thus it was a very bad day indeed when Taiwan’s entire bullet train system was disabled for nearly an hour by an unknown attacker. It got even worse when that attacker turned out not to be the implacable and hyper-resourced state actor over the Taiwan Strait, but a university student with a yen for radio and some kit he bought online. On the one hand, it’s good to see the good repair of the grand tradition of young hackers causing havoc from their bedrooms. On the other, WTRF? The information released by the Taiwanese authorities is scant on details, but enough to be pretty sure what actually happened. It’s bad news not just for Taiwan but for more than 100 countries that also use the TETRA two-way radio standard involved, often for emergency services. In many cases, it was the default replacement for unencrypted FM two-way radios, adding encryption, flexibility and network security. These were state of the art when TETRA was developed in the 1980s and 1990s — and work as well in 2026 as you might expect. Oops. There have been upgrades and, especially after the 2023 vulnerability disclosures, an accelerated program of making things better. A lot of the installed base globally is old, lacks over-the-air updates for security, and in any case spending money on new radios is normally at the bottom of the list for any state or public service organizations. Things have to get really bad first. Perhaps they just have. (North America is the only region where TETRA is uncommon, as it isn’t approved for public service use. This was either acute foresight or the fact that the TE in TETRA, now officially TErrestrial, used to stand for Trans-Europe. The American system, P.25, has never, however, been renamed Freedom Frequencies. Now on with the show) The network vulnerabilities are one side of the story. Our doughty hacker is the other. Reportedly, he didn’t have any TETRA hardware, but a laptop connected to a radio and an ‘SDR filter’. The latter makes little sense, it is far more likely that he had a software defined radio (SDR) called a HackRF. There are plenty of other devices that could have been used, but the HackRF is the weapon of choice for the gung-ho radio nut. SDR is a technique that has completely changed the rules of how to radio. All radios before it had to be entirely or mostly analog, with precision hardware dedicated to whatever job each radio had to do. This hardware could also be looked at as an analog computer, as it can be modelled as a set of mathematical transformations on the received signal. Analog computers have their place, just not in the 21st century. SDR is radio as digital computer. At heart, it has three components: an analog to digital converter to turn the incoming signal to a stream of numbers, very fast processing to do the radio math, and a digital to analogue converter to play the results. What you get is triply terrific. Digital processing is perfect, analog processing adds noise and distortion. Nothing is fixed, everything can be re-engineered with new code. And it can be hog-whimperingly cheap. HackRF is all those things and more. It can be configured as a portable touch-screen device. It transmits and receives from DC to daylight. You can pick one up for less than the price of a mid-range mobile. It is open source. It works with all manner of SDR creation tools, utilities and radio packages. There are infinite legitimate uses. Most excitingly, you can download apps for it that do everything, most especially the kind of thing that will introduce you with surprisingly rapidity to a wide range of new friends with no sense of humor and love letters that look suspiciously like arrest warrants. Think of it as speed dating but with more guns and less no thank yous, GPS spoofing, aviation and marine location transponders, satellite comms, data eavesdropping and injection - take your pick. You’ll need it to unlock the cell door. It is the data detection and injection that seems to have been the downfall of all concerned. A handset had its transmission decoded, and the result was retransmitted into the system as if it were that original radio. Whether the decoded data already had the General Alarm set, or whether the data had to be modified before retransmission, is not yet known. Doesn’t matter. It’s called a replay attack, and it has and is mostly used in stand-alone devices called code grabbers to unlock and steal expensive cars with wireless keys. Some countries, including Canada and the UK, have banned code grabbers, but this has failed on two counts. Code grabbers are small gadgets that can be bought online from China, and good luck policing that. Also, thieves are notably indifferent to laws. That notwithstanding, the UK is thinking of extending the ban to other classes of naughty wireless, and would doubtless like to do the same with HackRF, at least as of last week. Of course, they can’t be banned. SDRs can’t be banned as a class, especially open source ones made out of standard chips and open code. They are general purpose computers, albeit with specialisms. It doesn’t matter if you’re dismayed or delighted that things like HackRF exist, that genie is out of the bottle. What is truly dismaying is that replay attacks are a solved problem, trivially so. Choose a big keyspace, randomize and never repeat keys. That one is on lazy car makers and, apparently, the world of TETRA. Fixing that class of lazy, outdated security vulnerability will be very expensive. Embedded systems are like that, especially old ones. Not fixing this will be a gamble with infinite downside, in a world where electronic warfare systems that used to cost hundreds of millions now pour out of Ali Express for a few bucks. HackRF is to Tetra like Crocodile Dundee’s knife is to the mugger’s. Critical infrastructure resilience. Just three little words, but if you say them you better mean it. And it won’t be cheap. ®

AMD představila technologii DGF SuperCompression (DGFS), která rozšiřuje loni představený formát Dense Geometry Format (DGF) pro efektivnější ukládání a streamování geometrie nejen při ray tracingu…

A malicious Hugging Face repository managed to take a spot in the platform's trending list by impersonating OpenAI's Privacy Filter open-weight model to deliver a Rust-based information stealer to Windows users. The project, named Open-OSS/privacy-filter, masqueraded as its legitimate counterpart released by OpenAI late last month (openai/privacy-filter), including copying the entire descriptionRavie Lakshmananhttp://www.blogger.com/profile/[email protected]

Maličký dron DJI Neo zlevnil na 3590 Kč, v akci je i sada s ovladačem. • Nepotřebujete na něj „řidičák“, točí ve 4K a má výborného autopilota. • Neo vzlétne z dlaně a bude létat kolem vás, aniž byste jej museli ovládat.

Ukrajinská Celebra Tech se pochlubila novým vylepšením laseru Tryzub pro ničení celého spektra nepřátelských dronů. Nedávno jej nainstalovala na mobilní platformu pro snadné přesuny na bojišti. Název laseru „Tryzub“ odkazuje na ukrajinský státní symbol a odborná komunita o něm ví poslední dva ...

Nabídku výpočetních akcelerátorů Nvidia opustila již před lety, kdy přešla čistě na AI. Od té doby nárůst výkonu v FP64 vektorech zpomalil až ustrnul. AMD zčeří stojaté vody HPC segmentu s MI430X…

Znamená pomalost přemýšlivost? A co u AI? Acronis uvádí GenAI Protection pro bezpečné využívání AI. Umělá inteligence ve hrách přeceňuje inteligenci lidí. Huawei představuje AI řešení jako nové příležitosti růstu poskytovatelů internetových služeb. Budoucnost suverénní AI v Evropě určuje transparentnost open source.

Stát po firmách chce, aby za stejnou práci platily stejně. Jenže do stejné mzdy jim zároveň promítá svátky, dovolené, nemocenské, návštěvy lékaře i další překážky v práci. Výsledkem je rozpor mezi legislativní představou rovnosti a tím, co zaměstnavatel vnímá jako skutečné ocenění odvedené práce.

Zjistíme jak krvácí lama, jak AI zvyšuje tlak na dovednosti bezpečnostních týmů a podíváme se, jak chutná kyberzločincům AI šlichta. Pozornost věnujeme také zranitelnosti Apache a incidentu na Taiwanské dráze.

Tým Linux Mint oznámil plán vydat instalační média s rozšířenou podporou hardwaru (HWE). Jeden z vývojářů projektu Devuan vytvořil fork nástrojové sady GTK2. Společnost Valve zveřejnila nákresy ovladače Steam Controller.

Experti testující ofenzivních možností umělých inteligencí z kalifornské společnosti organizace Palisade Research zkusili, jestli se velké jazykové modely, včetně GPT-5.4 a Claude Opus 4 dovedou sami zkopírovat do jiného počítače. Některé to zvládli, i když jen v laboratorním příznivém prostředí. Skynet prý zatím není na pořadu dne, ale obezřetnost jistě bude na místě.

Ač se Zen 6 pro desktop zdá být relativně daleko, nová řada základních desek se nejspíš objeví již na Computexu. Očekává se, že po stránce hardwaru i BIOSu přijde s překopanou podporou pamětí…

Attackers are abusing Google Ads and legitimate Claude.ai shared chats in an active malvertising campaign. Users searching for "Claude mac download" may come across sponsored search results that list claude.ai as the target website, but lead to instructions that install malware on their Mac. [...]

Apple potají vyjednává o výrobě procesorů ve Spojených státech • Hledání druhého dodavatele motivují strategická geopolitická rizika • Samsung a Intel však kapacitami na dominantní TSMC nejspíš nestačí

When you have a hammer, the world is full of nails. There is no clearer description of Silicon Valley’s view of AI. The result is what I call the Hammer of AI: a single tool wielded against every problem we face, regardless of whether the problem yields to computation at all. There is a now-familiar […]

Před dvěma lety se světoví analytici smáli. Země, kde často nešel proud, zakázala dovoz aut se spalovacími motory. Dnes smích utichá. Etiopie se stala laboratoří elektromobility a vidíme pozitivní i negativní stránky věci. Je to necelých osmadvacet měsíců od chvíle, kdy etiopský ministr dopravy ...

German authorities have shut down a relaunch version of the criminal marketplace 'Crimenetwork' that generated more than 3.6 million euros, and arrested its operator. [...]