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An example of what's wrong with naive Merkle Tree implementation. Also included is a solution to the fool's errand of providing a reversible password hash. This salted password hash is trivially reversible for passwords up to 9 English characters in length. Different salts result in different hashes, and different aliasing of longer passwords to 9-character passwords. At least if you have a longer password, the hash reversal won't reveal your actual password.