Does whistleblower Edward Snowden have a secret cache of National Security Agency documents? U.S. and British intelligence officials now say he does. They claim that “the worst is yet to come” from Snowden.

Reuters reports that intelligence officials claim that there exists a “doomsday” cache of secret documents hidden on an Internet data cloud. The heavily protected crop of documents allegedly includes the names of U.S. and allied intelligence personnel. The data cloud is protected by encryption and multiple passwords. The material is allegedly separate from the other documents Snowden gave to journalists.

Reuters also relays U.S. intelligence officials’ worry that China and Russia could get their hands on the material, though no evidence has ever been produced to support those claims.

Glenn Greenwald, one of the journalists Edward Snowden leaked to, has said that if anything happens to Snowden, people around the world have access to the full cache. It’s an insurance policy against being harmed.

“If anything happens at all to Edward Snowden, he has arranged for them to get access to the full archives,” Greenwald told the Daily Beast in June. “I don't know for sure whether has more documents than the ones he has given me… I believe he does.”

Obama administration officials have said privately that Snowden’s revelations could fuel two more years worth of stories, according to Reuters.