Crypto security

Breakdowns of hacks, freezes and scams, and what they mean for you: where to keep your coins, how to check addresses and why your own wallet is safer than an exchange.

An open parcel locker cell where the ribbon on the parcel turns out to be a copper antenna leading to a hidden transmitter
Security

Ledger with a spy chip found on Ozon: what we know and what to do if your wallet came from a marketplace

A Ledger Nano X bought on Ozon had a spy chip that steals the 24-word phrase. What we know, why Genuine Check misses it, the fake firmware update scam and what to do.

7 min
A golden quantum chandelier casts a violet beam onto a field of coins: the uncovered coins glow red, while the beam slides off coins sealed in frosted shells
Security

The quantum threat to bitcoin: Google in Science, 6 million BTC with exposed public keys and Germany's deadlines

Google took a step toward reliable quantum computing, a new alliance counted 6.04M BTC with exposed public keys and Germany set deadlines. What bitcoin holders should do.

8 min
A robotic arm takes one glowing key from a wall of hundreds of identical keys and uses it to open a glass safe with coins
Security

An OpenAI agent found someone else's wallet through a well-known seed phrase and spent its coins

An OpenAI agent checked 362 addresses from public seed phrases, found a wallet with test ETH and paid for its task with it. Why a known seed phrase is an open safe.

8 min
A chrome fishing hook baited with a coin and a second hook behind it, wire cutters snipping the line, server racks going dark in the background
Security

Brooklyn DA and FBI take down 241 fake crypto investment sites: how the scam targeting Russian speakers worked

Brooklyn prosecutors and the FBI knocked out 112 servers of a scam that robbed Russian-speaking Americans, then offered to "recover" the money. How it worked.

8 min
A massive chrome vault door with an old combination lock, a robotic arm fitting a new glowing lock next to it, and an hourglass with purple sand in front of the door
Security

Coinbase urges bitcoin to prepare for quantum computers now: what it proposes

Coinbase, which holds about 5% of all bitcoin, wants the move to post-quantum signatures started now. Its six recommendations and what BTC holders can do.

8 min
A night street of identical glass kiosks with their shutters down, only one open and lit, a sealed glass cube on its counter
Security

Trezor drops part of its reseller network and MediaMarkt halts Ledger sales: what changes for hardware wallet buyers

On October 13, Trezor said some resellers will lose authorization on January 1, 2027, and MediaMarktSaturn halted Ledger sales. What this changes for buyers.

8 min
A glass jar of coins with thin red threads running from its neck into the fog, chrome scissors cutting one of them
Security

How to Check and Revoke Token Approvals on Your Wallet in 2027

A token approval stays valid until you revoke it, and it is how USDT and other tokens get drained. How to check your approvals and revoke the extra ones, step by step.

9 min
A dark glass lighthouse whose beam a red prism bends toward the rocks, where a boat carrying a gold coin is heading
Security

Coldcard X account phishing: the official account sent wallet owners to an "urgent migration" link

On October 11 Coldcard's official X account carried a fake post about an urgent wallet migration. What is known, how to spot a fake, what to do if you entered your seed.

7 min
An opened chrome egg with a mechanical spider inside, sitting among glowing circuits with a red light and an antenna
Security

Ledger confirms a hardware implant in a CryptoBilis wallet: what we know and where the stolen coins are going

Ledger confirmed an unauthorized hardware implant in one impacted CryptoBilis buyer's device. Losses are put near $93 million: where the coins go and what to do.

8 min
A sealed glass sphere filled with identical coins and a chrome patch over a crack, with ghostly coins melting away beside it
Security

XRP Ledger bug from 2015 that let XRP be created out of nothing is fixed: what holders should do

The XRP Ledger patched a bug from 2015: one payment could create new XRP beyond the 100 billion. How it worked, whether anyone was hit and what XRP holders should do.

7 min
Glass door with a glowing mint peephole showing a verified room full of coins
Security

How to check if a crypto exchange is legit before you send: signs of an honest service and a scam

How to check if a crypto exchange is legit before your first swap: the real URL, rate and payout upfront, order ID, refund address, support and what to never share.

10 min
A glass box with a chrome key inside, while its red-glowing double hangs in the fog outside
Security

Ledger CryptoBilis wallet drains: $86 million gone, what we know and how to check your wallet

Ledger is investigating wallet drains hitting CryptoBilis buyers in Southeast Asia, with losses put at $86 million. What we know and how to check your own wallet.

9 min