Oblivious pseudorandom function: Difference between revisions

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Password-Bases Key Derivation: Renamed title section
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An OPRF can be viewed as a special case of [[homomorphic encryption]], as it enables another party to compute a function over an [[Ciphertext|encrypted input]] and produce a result (which remains encrypted) and thereby it learns nothing about what it computed.
 
==== Password-BasesBased Key Derivation ====
 
Most forms of password-based key derivation suffer from the fact that passwords usually contain a [[Password_strength|small amount of randomness]] (or entropy) compared to full-length 128- or 256-bit encryption keys. This makes keys derived from passwords vulnerable to [[brute-force attacks]].