JoshuaZ comments on A sealed prediction - Less Wrong Discussion
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Comments (43)
There's another reason not to do so. No one has thought strongly about how the different hashes would interact together. It wouldn't surprise me if there were some way given the various hashes to extract information that would not otherwise be extractable given any single hash scheme. This is all the more plausible given that you've given the hash for the fairly weak md5. The multiple hashes you have given make it implausible that you could have multiple texts that lead to the same result; adding more hash types has more of an effect now of making it conceivable that a sufficiently interested individual could identify your text.