The Technical Concepts Behind the 2022 Crypto Hacks
What a Solidity developer needs to follow the 2022 hacks: bridge message checks, Solana accounts, flash-loan governance, Profanity keys, CREATE replay.
2026, Oct 07 — 18 minute read
Crypto Hacks of 2021 - Poly Network, BitMart, Cream and the DeFi Boom
About $3.2B was stolen in crypto hacks in 2021. Poly Network's ~$611M led a year of DeFi exploits, exchange hot-wallet thefts and front-end attacks.
2026, Oct 07 — 25 minute read
The Technical Concepts Behind the 2021 Crypto Hacks
What a Solidity developer needs to follow the 2021 hacks: selector collisions, share-price donations, K-check typos, token reentrancy, ECDSA nonce reuse.
2026, Oct 07 — 27 minute read
Crypto Hacks of 2020 - KuCoin, Flash Loans and the DeFi Summer
About $520M was stolen in crypto hacks in 2020 (Chainalysis). KuCoin lost over half; DeFi's first flash-loan and reentrancy attacks hit bZx, Harvest and Pickle.
2026, Oct 07 — 24 minute read
The Technical Concepts Behind the 2020 Crypto Hacks
What a Solidity developer needs to follow the 2020 hacks: first flash loans, ERC-777 hooks, fee-on-transfer tokens, self-transfers, msg.value in loops.
2026, Oct 07 — 24 minute read
Crypto Hacks of 2019 - Binance, Upbit, CoinBene and the EOS Casino Attacks
About $283M was stolen from 11 crypto exchanges in 2019 (Chainalysis). Binance, Upbit and CoinBene led; EOS casinos were attacked dozens of times.
2026, Oct 07 — 20 minute read
The Technical Concepts Behind the 2019 Crypto Hacks
What a smart-contract developer needs to follow the 2019 hacks: fake deposits, EOS rollbacks and random seeds, XRP partial payments, 0x return data.
2026, Oct 07 — 22 minute read
