Blockchain Security

SecondFi confirmed three external attacks that drained 16 million ADA from 374 wallets through a flaw in its wallet generation software. The team says it secured another 129 million ADA before attackers could reach it, but losses could still exceed $20 million.

The Algorand Foundation has unveiled a plan to harden its network against future quantum threats, with user-facing upgrades slated to begin in 2026. The roadmap reflects a broader industry push to prepare blockchain infrastructure for post-quantum cryptography.

North Korea-linked hackers have stolen over $2 billion in cryptocurrency in 2025, nearly triple last year’s total. Elliptic says funds are used to support Pyongyang’s weapons programs.