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Illegal Hashes

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A padlock engraved into a circuit board.

To understand this blog post, you need to know two things. There exists a class of numbers which are illegal in some jurisdictions. For example, a number may be copyrighted content, a decryption key, or other text considered illegal. There exists a class of algorithms which will take any arbitrary data and produce a fixed length text from it. This process is known as "hashing". These algorithms …