Bitcoin #wallets older than 2016 could be #vulnerable to critical #security flaws, potentially putting over $1 billion at risk. Many wallets were built on open-source software with weak random number generators, making them susceptible to brute-force #attacks. Unciphered has contacted over a million people to address the issue, but millions more may be affected with no direct way to notify them.

https://gizmodo.com/old-bitcoin-wallets-security-flaws-randstorm-unciphered-1851020470