Months before the collapse of FTX, some of its U.S.-based employees discovered the so-called backdoor that Alameda Research allegedly used to withdraw billions of dollars of customer fundsfrom the cryptocurrency exchange, people familiar with the matter said.

Months before the collapse of FTX, some of its U.S.-based employees discovered the so-called backdoor that Alameda Research allegedly used to withdraw billions of dollars of customer funds from the cryptocurrency exchange, people familiar with the matter said.