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May 10, 2014, 01:41:19 AM |
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Bitcoin core wallet encryption uses a salted KDF and 100ms (on your computer) worth of SHA512, with a hard minimum of 25,000 iterations (though on normal computers its well in excess of 100k iterations). There is only so much you can do for a really bad key, but Bitcoin core does the prudent thing and makes very fast searches infeasible.
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