Hashing | Search algorithms | Cryptographic hash functions | Computational complexity theory

Universal hashing

In mathematics and computing, universal hashing (in a randomized algorithm or data structure) refers to selecting a hash function at random from a family of hash functions with a certain mathematical property (see definition below). This guarantees a low number of collisions in expectation, even if the data is chosen by an adversary. Many universal families are known (for hashing integers, vectors, strings), and their evaluation is often very efficient. Universal hashing has numerous uses in computer science, for example in implementations of hash tables, randomized algorithms, and cryptography. (Wikipedia).

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UMAC | Randomized algorithm | Double hashing | K-independent hashing | Cryptography | Dynamic perfect hashing | Rolling hash | Hash table | Tabulation hashing | 2-choice hashing | Linear congruential generator | Hash function | Mathematics | Mersenne prime | Message authentication code | Low-discrepancy sequence | Ring (mathematics) | Geometric distribution | Cuckoo hashing | Expected value | Rabin fingerprint | Universal one-way hash function | Statistical distance | Image (mathematics)