Odaily News According to CertiK monitoring, the largest hacker losses so far in October came from private key leaks. Since the third quarter, most of the losses have been caused by PKC and phishing. Since the beginning of this month, CertiK has recorded 3 major PKC incidents with a total loss of approximately US$60 million, including: Radiant Capital approximately US$55 million, Tapioca DAO approximately US$4.5 million, and Burve Protocol approximately US$500,000.