Why 1/27 (which is close to 4%, not 1). Why not 1/10 (10%)?
Otto
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On 6 Sep 2023, at 03:10, John Hay via groups.io <OceanCity@...> wrote:
I don't understand how a 256-bit encrypted file can be decrypted considering the following example.
Let's say you are one of the most powerful entities on earth and you devote as much power as the whole bitcoin mining infrastructure to breaking this encryption. Bitcoin manages about 267
hashes per second by consuming about 5% of the world's total electricity production. The cost of trying out an AES key is comparable to a hash. Let's further say you'll be happy with a 1/27
chance of success (almost 1%), so you'll need time to try about 1/27
of the 2128 possible keys. This will take 2128/27/267=254s¡Ö6?108yr. That's over half a billion years. That is such a long while that in practical terms, it means it won't happen.
Can someone explain?
