"Blockchain security firm CertiK publicly identified itself as the "security researcher" that cryptocurrency exchange Kraken accused of stealing $3 million in cryptocurrency. CertiK reportedly exploited a vulnerability that allowed them withdrew millions of dollars from Kraken's account. Kraken accused CertiK of "extortion" by refusing to return any of the funds until the exchange agreed to provide the "presumed amount the error entailed." could cause if they don't disclose it". 🕵️‍♂️#CertiK#Kraken#Blockchain#CryptoNews"