Physical Security | Breaking Cybersecurity News | The Hacker News

Researchers at Ledger's Donjon security team  have shown that a precisely timed laser pulse, aimed at the chip inside a Tangem crypto wallet card, can reset the card's password to anything the attacker picks. No old password. No backup card. Once it is reset, whoever did it controls the wallet and can move the coins out. This is not an emergency for most owners. The attack needs the physical card in hand and a lab that Donjon puts at around $250,000. It also means cutting the card open, which leaves damage no one can miss. It cannot be done over the internet, and there is no fix coming: Tangem cards cannot take software updates, so every card already sold carries the flaw. The one group that should act now is anyone whose card is lost or stolen and holds serious value. How the card is meant to protect you A Tangem wallet looks like a plain bank card. Tap it to your phone, and a companion app talks to a Samsung S3D232A chip inside. That chip is a ...

Researchers at  Shandong University  have shown a fast new way to pull data off computers that are cut off from every network. The technique, called  TrojPix , tweaks on-screen pixels in ways the eye cannot see, so that the video cable carrying them radiates a faint radio signal a nearby receiver can decode. But TrojPix works only once malware is already on the target machine, so it is a way for stolen data to get out, not a way in. In the researchers' tests, TrojPix hit a peak throughput of 8.1 Mbps and reached as far as 208 meters, the two measured separately rather than together. Most air-gap covert channels crawl along at bits or kilobits per second; at 8.1 megabits, roughly a megabyte a second, TrojPix could move a 100 MB file in under two minutes. That turns the threat from leaking a password into moving whole files while the monitor looks switched off. Real-world range is another matter: a receiver still has to fight through walls, shielding, and noise. Th...