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hash of data

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  • Hash function — A hash function is any well defined procedure or mathematical function for turning some kind of data into a relatively small integer, that may serve as an index into an array. The values returned by a hash function are called hash values, hash… …   Wikipedia

  • Hash join — The Hash join is an example of a join algorithm and is used in the implementation of a relational database management system.The task of a join algorithm is to find, for each distinct value of the join attribute, the set of tuples in each… …   Wikipedia

  • Hash — may refer to:* Hash symbol, #, called number sign or pound sign in the USA and Canada * Hashish, a psychoactive drug derived from the Cannabis plant * Hash (food), a coarse chunky mixture of beef and other things, e.g. corned beef hash ; cf. Hash …   Wikipedia

  • Data integrity — in its broadest meaning refers to the trustworthiness of system resources over their entire life cycle. In more analytic terms, it is the representational faithfulness of information to the true state of the object that the information represents …   Wikipedia

  • Data Encryption Standard — The Feistel function (F function) of DES General Designers IBM First publis …   Wikipedia

  • Hash key — can have several meanings.* For its use to describe the key on a telephone keypad, see number sign. * For its use in data base and cryptographic applications, see hash function …   Wikipedia

  • Hash table — Not to be confused with Hash list or Hash tree. Unordered map redirects here. For the proposed C++ class, see unordered map (C++). Hash Table Type unsorted dictionary Invented 1953 Time complexity in big O notation Average Worst case Space …   Wikipedia

  • Hash tree — A binary hash tree In cryptography and computer science Hash trees or Merkle trees are a type of data structure[citation needed] which contains a tree of summary information about a larger piece of da …   Wikipedia

  • Data deduplication — In computing, data deduplication is a specialized data compression technique for eliminating coarse grained redundant data. The technique is used to improve storage utilization and can also be applied to network data transfers to reduce the… …   Wikipedia

  • Hash list — In computer science, a hash list is typically a list of hashes of the data blocks in a file or set of files. Lists of hashes are used for many different purposes, such as fast table lookup (hash tables) and distributed databases (distributed hash …   Wikipedia

  • Hash collision — In computer science, a hash collision or hash clash is a situation that occurs when two distinct inputs into a hash function produce identical outputs.All hash functions have potential collisions, though with a well designed hash function,… …   Wikipedia

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