- Blockchain is a digital ledger that records every transaction on a public network.
- Once a transaction is recorded, it cannot be changed or deleted.
- It is the foundation of Bitcoin, Ethereum, and thousands of other cryptocurrencies.


North Korean hackers stole $270 million from Drift Protocol on Solana. They didn't break the code - they spent six months tricking the people who control the wallet.
The attackers gained approval for misleading transactions using a Solana feature called 'durable nonces.' These pre-signed transactions stayed valid for over a week - long enough to execute the theft.
The hack wiped out 50% of Drift's total value.
The Solana Foundation launched 'Stride,' a security audit program led by Asymmetric Research. It evaluates DeFi protocols against eight security standards.
The Foundation also announced SIRN - a network where protocols share threat intelligence.
Watch whether other Solana protocols adopt Stride's recommendations before similar social engineering attacks strike.