16 Sep '13, 1pm

Could the intelligence community have a secret exploit for Bitcoin? via @ageis

Could the intelligence community have a secret exploit for Bitcoin? via @ageis

Bitcoin employs an ingenious mix of two concepts: hashing and signatures. Hash functions typically generate a fixed-length output that maps uniquely to the original input, while signatures are often used to verify the authenticity of a digital message or document. The integrity of Bitcoin’s blockchain and consensus over the ordering of transactions depend on a hash function called SHA-256, which was designed by the NSA and published by the National Institute for Standards and Technology (NIST). Cryptography researcher Matthew D. Green of Johns Hopkins University reveals, “If you assume that the NSA did something to SHA-256, which no outside researcher has detected, what you get is the ability, with credible and detectable action, they would be able to forge transactions. The really scary thing is somebody finds a way to find collisions in SHA-256 really fast without brute-...

Full article: http://www.dailydot.com/opinion/bitcoin-nsa-exploit-intel...

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