> A longer running challenge is http://www.drdobbs.com/architecture-and-design/the-enduring-.. http://www.drdobbs.com/architecture-and-design/the-enduring-....

> A longer running challenge is http://www.drdobbs.com/architecture-and-design/the-enduring-.. http://www.drdobbs.com/architecture-and-design/the-enduring-.... No entry fee, $100 prize, and just as unfair. At the 10-year scale, a whole new set of tricks opens up. Invent a sufficiently popular programming language, or contribute a lot to the linux kernel, and start surreptitiously hiding bits of the file on his OS (the easiest would be for you language to have a builtin function that spits out a small part of the file).