On-chain Safety Education
Onchain Diary is an independent Web3 safety education site: 98 deep-dive articles, a 232-term glossary, and the complete BIP-39 wordlist — covering 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.
ZEC holders moving funds off exchanges face a fork in the road: transparent addresses work on any hardware wallet, shielded addresses mostly don't. What Trezor and Ledger actually support, three working cold-storage setups, and the scams targeting new Zcash users.
The SQUID token let people buy but never sell, and it ran on BNB Chain. Learn the specific scam patterns on BSC and the exact steps to verify any BEP-20 token before you buy.
Polygon's low fees and Ethereum association attract legitimate DeFi and every clone-token scam that follows. The exact steps to verify any Polygon token before you buy.
ZecBit charged for a testnet NFT and left a 0.1 ZEC complaint in its wake. zaddr.net is free and asks for almost nothing. The second one is the more interesting case. Here is what each model actually collects.
Arc, Circle's stablecoin L1, is live. One hour of on-chain data already shows duplicate-ticker copycats, +6,475% pumps, and fake-airdrop warnings. A field guide with real numbers.
As the Strait of Hormuz crisis drags on, shipping companies are receiving messages that promise safe transit in exchange for Bitcoin or USDT — sent by people impersonating Iranian officials. This is the rare crypto scam aimed at shipmasters and charterers rather than retail investors, and it works because Iran really is charging crypto tolls. How the extortion messages work, what's real and what's fake in the maritime payment landscape, how firms like TRM Labs trace the flows, and the verification checklist for anyone in logistics receiving a crypto transit demand.
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 232+.
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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