Cryptocurrency
Blockchain hashing, wallets and on-chain incidents. Clear-eyed coverage of how crypto works under the hood, the security trade-offs, and the hacks and exploits worth learning from.
Signature Replay Attack Testing: 12 Foundry Steps, 90 Min [2026]
Every audited smart contract tutorial on this site so far has covered reentrancy, flash loan oracle attacks, and access control gaps. There’s a fourth bug class that drains…
DeFi Price Manipulation Exploits Triple to 32 [2026]
DeFi lending just had its worst year yet for a specific kind of theft: the price manipulation exploit. Blockchain intelligence firm TRM Labs counted 32 price-manipulation attacks in…
Shamir Secret Sharing for Bitcoin Seeds: 12 Steps [2026]
Roughly 2.3 to 3.7 million bitcoin, worth hundreds of billions of dollars at current prices, sit in wallets nobody can open anymore. Chainalysis and Ledger Academy both point…
Stolen Keys Beat Code Bugs as DeFi Hacks Hit $1.3B [2026]
Crypto security teams spent most of the last few years bracing for the next reentrancy bug or oracle manipulation exploit. That threat model is now out of date.…
Notional Finance Exploit Drains $1.73M via 2^128 Bug [2026]
A number that should never exist just cost a DeFi lending protocol $1.73 million. On September 4, 2026, an attacker drained a legacy escrow contract on Notional Finance…
$240M Bitcoin Heist: Lam Faces 14 Years, 18 Charged [2026]
Malone Lam pleaded guilty before a federal judge in Washington, D.C. on September 8, 2026, in what prosecutors call the largest known single-victim Bitcoin theft in U.S. history.…
Access Control Bugs Cost $953M: Test in 12 Steps [2026]
Access control bugs quietly became the most expensive category of smart contract failure. OWASP’s 2026 Smart Contract Top 10 ranks access control vulnerabilities at #1, tying them to…
Liquid Network Hack Drains $320M, Sidechain Paused [2026]
A Bitcoin sidechain that exchanges and traders treat as boring infrastructure just became the biggest crypto security story of the week. On September 6, 2026, roughly 4,000 BTC,…
Bridge Security Testing: 12 Steps After $190K Hack [2026]
On August 19, 2026, an attacker drained 191,156 USDC from Allbridge’s CCTP router on Base by redeeming a Circle-style message that moved no real money. Three weeks earlier,…
Crypto Hacks Hit Record 50 in Aug as Losses Fall 49% [2026]
Crypto security trackers logged 50 separate hacks in August 2026, the highest monthly attack count of the year. Yet total losses for the month fell 49.5% from July,…
