100 bits of entropy takes around 10^26 seconds to crack [1] Even if you somehow managed to get a botnet of 100 million machines, it would still take longer tha

100 bits of entropy takes around 10^26 seconds to crack [1] Even if you somehow managed to get a botnet of 100 million machines, it would still take longer than the age of the universe to brute force it. Security of 3DES is effectively 112 bits [2] if random keys are used. Although as I said, this is assuming adobe weren't completely stupid (and reused one or more of the keys, or used non-random keys) [1] https://dl.dropboxusercontent.com/u/209/zxcvbn/test/index.html [2] http://en.wikipedia.org/wiki/Triple_DES