Xkcd: Encryptic

Re:Xkcd: Encryptic by rmc on Monday November 04, 2013 @07:25AM (#6668151)

What's the status with figuring out the encryption key and breaking all those passwords? Surely there are known passwords. Is there any distributed brute force attempt that I can help with?

[ Parent | on HN ]

Re:Xkcd: Encryptic by shawabawa3 on Monday November 04, 2013 @10:15AM (#6668948)

1. That's probably illegal so if there was one it wouldn't be publicly advertised

2. If adobe weren't completely stupid (a big if admittedly) it will be infeasible to brute force (>100 bits of entropy)

[ Parent | on HN ]

Re:Xkcd: Encryptic by rmc on Monday November 04, 2013 @10:36AM (#6669111)

> it will be infeasible to brute force (>100 bits of entropy)

Really? Even a massively distributed attempt?

[ Parent | on HN ]

Re:Xkcd: Encryptic by shawabawa3 on Tuesday November 05, 2013 @04:59AM (#6674260)

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

[ Parent | on HN ]