Bruce Schneier writes: I am deeply skeptical of the FBI’s announcement on Friday that North Korea was behind last month’s Sony hack. The agency’s evidence is tenuous, and I have a hard time believing it. But I also have trouble believing that the U.S. government would make the accusation this formally if officials didn’t believe it.

Clues in the hackers’ attack code seem to point in all directions at once. The FBI points to reused code from previous attacks associated with North Korea, as well as similarities in the networks used to launch the attacks. Korean language in the code also suggests a Korean origin, though not necessarily a North Korean one since North Koreans use a unique dialect. However you read it, this sort of evidence is circumstantial at best. It’s easy to fake, and it’s even easier to interpret it wrong. In general, it’s a situation that rapidly devolves into storytelling, where analysts pick bits and pieces of the “evidence” to suit the narrative they already have worked out in their heads.

In reality, there are several possibilities to consider: [Continue reading…]