On-chain Safety Education
Onchain Diary is an independent Web3 safety education site: 77 deep-dive articles and a 220-term glossary on crypto scams, smart contract security, and on-chain analysis. No jargon. No sign-up. No tools to install. Just the knowledge you need to stop getting rekt.
Guides, tutorials, and deep dives.
Hardware wallets are sold as the safest way to store crypto — until the purchase itself becomes the attack. Here are the six scam patterns, real cases, and a buy-side checklist.
Fake moderator DMs that install Windows malware, Telegram friends who slowly sell you a honeypot, airdrop emails from lookalike domains — how the social engineering playbook works at each step.
An audit badge tells you almost nothing on its own. Learn how to read scope, severity levels, and fix statuses in a smart contract audit report — and spot the projects that only look audited.
SIM swapping lets attackers take over your phone number, then your exchange accounts. Here's the full attack chain, real cases, and the defenses that actually stop it.
Clipboard hijackers silently swap the wallet address you copy for one controlled by the attacker. We explain how the malware works, the documented campaigns from the 2.3-million-address 2018 operation to modern clipboard-injector kits, and the two-second habit that defeats all of them.
Pig butchering is the single highest-loss cybercrime category in the FBI's IC3 data. We break down how the grooming funnel works, what the fake trading platforms actually do to your deposits, and what the money trail looks like on-chain.
Reading is half. The other half is recall.
Every question is drawn strictly from the Yellow Paper's own text. No outside knowledge required — if you've read it, you can pass it.
Take the quiz → T-02Sixteen scenario questions sort you into one of sixteen security personas — hunter or prey — with a safety index and a shareable result card.
Find your type →A few terms to get you going — the full glossary has 220+.
Whether you're new to crypto or deep into DeFi, understanding how scams work is the best defense. Every guide here is free.
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