Crypto Hacks and Security, Page 8

Holz-Karteikasten von oben, eine einzelne blanke Karteikarte ist aus der dicht gefuellten Reihe herausgehoben

Blockchain Rollback After an Exploit: What Happens to Your Tokens When a Chain Is Reset

At Harmony, roughly four billion ONE were minted without authorisation, and a rollback of the chain has been on the table ever since. This piece explains what a blockchain rollback means technically, when it can still succeed, and what it triggers for your holding period.

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Sicherheitsschlüssel und Bitcoin-Münze im Licht, dahinter ein Telefon im Dunkeln – Sinnbild für Zwei-Faktor-Authentifizierung bei der Krypto-Börse

Two-Factor Authentication on a Crypto Exchange: Why SMS Is the Weakest Option

SMS codes are the most common form of two-factor authentication on crypto exchanges, and the weakest. The problem is not only SIM swapping, which the FBI has recorded falling for three years. It is real-time phishing, and against that neither SMS nor an authenticator app helps.

last month

Lange helle Wand mit dutzenden voellig identischen, leeren Bilderrahmen in gleichmaessigem Raster

BaFin Warnings 2026: 24 Crypto Platform Series With 639 Domains, and How to Check Your Provider

In 2026 BaFin is increasingly warning about entire series of near-identical crypto websites rather than about single providers. Our own count of the complete stock of warnings shows how large the phenomenon has become and which two register checks reliably vet a provider.

last month

Featured article image

Trezor Data Breach Exposes 13,689 Customers: Names, Phone Numbers and Home Addresses Leaked

A breach at Trezor shipping partner ShipMonk exposed names, phone numbers and home addresses of 13,689 customers. Devices are safe, phishing risk is not.

last month

Aufgeklappte unbeschriftete Edelstahlplatte neben einer geschlossenen Stahlkassette auf einer Holzwerkbank, daneben ein Schluessel und ein Schraubendreher

How to Store a Seed Phrase Safely: What Steel, a Passphrase and Multisig Do for Your Wallet Backup

The Coldcard case pushed the manufacturer question to the front, while barely touching on where the backup is kept. This guide places paper, steel, the passphrase and splitting methods against the BIP-39 and SLIP-0039 standards.

last month

Zwei gleich aussehende unbeschriftete Briefumschlaege auf einem grauen Schreibtisch, einer mit blindem Praegesiegel, daneben eine Lupe

Your Crypto Exchange Is Telling You to Withdraw: How to Spot Phishing After the MiCA Deadline

Unauthorised crypto providers now have to tell their EU customers to withdraw, which leaves fraudsters an easy run with faked requests. Here is how to check in two minutes whether the message is genuine.

last month

defi hack

$42 Million in Eight Days: Why ‘Decentralised’ Stopped Protecting Perp DEX Traders

Ostium and AFX were drained inside eight days – both times through keys, not smart contracts. The seven questions you must answer before any deposit.

last month

hardware wallet

$130 Million Gone Because the Randomness Was Predictable: Which Hardware Wallet You Can Still Buy

The Coldcard flaw proved the most respected wallet is not the safest. Which vendor has which track record – and why now is the wrong moment to pause your savings plan.

last month

bitcoin coin

Coldcard Losses Near $114 Million as a Fourth Sweep Hits: Why Is Bitcoin Rising Anyway?

A fourth wave of Coldcard sweeps took another 449 BTC on Monday, yet Bitcoin climbed back toward $64,000. Here is what changed and who is still exposed.

last month

bitcoin wallet

594 BTC Gone in 25 Minutes: The Coldcard Flaw That Made Seed Phrases Guessable

A firmware bug from March 2021 let an attacker drain $38 million from around 500 Bitcoin wallets. Here is what broke, who is exposed and what to do now.

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