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-2

Anything is crackable if you take one part of the whole. The key is made up of "parts" and if you treat it as such it can solve your problem faster. Table the data then move forward simultaneously. 128 bits at 8 bits with 16 threads with 1.3 flops a minute with a true 2.67 ghz cpu can crack 128 bits in 11.67 hours...obviously you need to write the code to ...

13

n is the exponent. So when n is doubled from 64 to 128 it doesn't mean that you have to try twice as many values. It means that you have to try $2^{64}$ times the amount you were already trying (as $2^{128} = 2^{2\times64} = 2 ^{64+64} = 2^{64}\times2^{64}$). It is required to only search half of the key space on average (if average is the correct term ...

2

Q: How long shall the RSA key be in order to be secure against practical attacks? A: Impractically large. This does not imply that RSA is unsafe against practical attacks; only that some of these attacks must be prevented by ways other than increasing the key size. That's because key size is not a parameter with a major impact on the efficiency of many ...

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