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Developer at Woot.com
Twitter: http://twitter.com/otac0n

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Project Euler


2d
comment Reverse engineering a hash?
@Pacerier, this question is 3 years old.
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comment A simple block cipher based on the SHA-256 hash function
This is almost the exact same algorithm as listed on this question: crypto.stackexchange.com/questions/48/… The answers there also provide some pretty good insight.
Dec
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awarded  Commentator
Dec
5
comment Reverse engineering a hash?
This is technically off topic, based on question #3 in the FAQ. But... we can have fun every once in a while, right?
Nov
25
comment Is a book cipher provably secure?
Right, I would say that the main difference between this and a one-time pad is that: a one time pad's security is based on all possible pads that could be created, whereas a book cipher's security is based on all possible books that have been created.
Nov
12
accepted What is pre-image resistance, and how can the lack thereof be exploited?
Nov
12
asked What is pre-image resistance, and how can the lack thereof be exploited?