🔐 "Got your keys, got your coins" - but what happens when those keys aren't as secure as you think? Our latest engineering deep-dive explores Bitcoin wallet security vulnerabilities and the importance of robust cold storage approaches. Essential reading for anyone serious about crypto security.

Block Engineering Blog

Got your keys, got your coins: how to backdoor a bitcoin wallet

Inside a Bitcoin wallet backdoor: covertly leaking seeds through bitcoin signatures.

At Block, we're all in on MCP! Learn how our InfoSec team is addressing security considerations like agent communication, tool connectivity, and supply chain risk. https://block.github.io/goose/blog/2025/03/31/securing-mcp