How Onchain Attacks Actually Happen
The anatomy of the big ones: reentrancy, oracle manipulation, stolen signing keys, abused upgrade powers, broken bridges, and what detection and response look like when it goes wrong.
6 lessons
An advanced course for people who want to understand the losses rather than just hear about them. Each lesson takes a class of attack, explains the mechanism in plain language, walks through incidents where it happened, and ends with the defenses that would have changed the outcome. It covers smart contract flaws, price oracle manipulation, key and signing compromise, upgrade and governance powers, cross-chain message verification, and the monitoring, circuit breakers and negotiation that follow an incident. No trading content, no tools to buy.
Chapters & lessons
Breaking the Code
Flaws in the contract itself: reentrancy, and prices that can be moved on demand.
Breaking the Keys and the People
Most large losses are not clever maths. They are signatures obtained from the right humans and powers that were always there.
Bridges, Detection and Response
Why cross-chain messages are the richest target, what monitoring actually watches, and what happens in the hours after.
Listen instead
The same chapters, by ear. One episode per chapter of this course.
Learn blockchain, wallets, stablecoins and on-chain markets, one clear lesson at a time.
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