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hash function
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hash function

In computing, an algorithm that calculates a value from the content of a message which can then be used to detect alterations to the original message.

Similar to a checksum but with greater security, hash functions play an important role in secure cryptographic systems (see cryptography), where authentication is as important as hiding the data from third parties.



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Useer's Password: "Giants" [down arrow] Hashing Function (encryption only; no decryption) [down arrow] Hashed Value: "66tt" Exhibit 4 Hashed Passwords: Vulnerable to Rainbow Tables The password table (below, left) contains a hypothetical hashed value of each password in the clear-text table in Exhibit 1.
(we would need to compute m hashed values per element scanned), and, worse, it would necessitate a large set of independent hashing functions, for which no construction is known [1].
Hash tables are created by using a hashing function (algorithm) to hash the keys into hash buckets.
 
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