Nice idea IF we had such mirrors. Afaik the farthest away is on the moon.[0] Also a one-time pad needs to be as large or larger than the data used to encrypt it

Nice idea IF we had such mirrors. Afaik the farthest away is on the moon.[0] Also a one-time pad needs to be as large or larger than the data used to encrypt it.[1] So your plan cannot be used for the several gigabytes wikileaks insurance file. But perhaps you can "pad" the key used to encrypt it? Probably. [0] http://en.wikipedia.org/wiki/Lunar_Laser_Ranging_experiment http://en.wikipedia.org/wiki/Lunar_Laser_Ranging_experiment [1] http://en.wikipedia.org/wiki/One-time_pad http://en.wikipedia.org/wiki/One-time_pad