Hints and tips:
...The answer was laid out five years ago in a paper by Satoshi Nakamoto, the pseudonym of an unknown programmer or collective. Bitcoin is a peer-to-peer file-sharing system....
...One needs to stop invidious speculation when the malefactors are unknown, and vigilantism when they are known but unreachable. This is more difficult than it sounds....
...This incident is virtually unknown to Americans. There has not been a single recounting of it in any US newspaper since the Gulf explosion. The writer is a senior editor at The Weekly Standard...
...Life expectancy fell among poor US men in the early 1960s, for unknown reasons, and in the late 1980s, probably because of Aids and crack cocaine....
...Vandalism and pillage started almost immediately and by Tuesday night the mayhem had reached levels unknown even at the height of the 2005 riots: dozens of cars and buses burnt, a library, a preschool and...
...Predatory paparazzi entered the world of American sports this spring, peddling to the New York tabloids photos of the aforementioned Alex Rodriguez, now with the Yankees, in the company of an unknown blonde...
...“Like unknown soldiers, they deserve a proper burial. It’s the least we can do. It would also be a way for whites and blacks to reach across the tracks and, at last, shake hands.”...
International Edition