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In cryptography, a random oracle is an oracle (a theoretical black box) that responds to every unique query with a (truly) random response chosen uniformly from its output domain. If a query is repeated, it responds the same way every time that query is submitted.
Lycurgus Consulting the Pythia (1835/1845), as imagined by Eugène Delacroix.. Pythia was the priestess presiding over the Oracle of Apollo at Delphi.There are more than 500 supposed oracular statements which have survived from various sources referring to the oracle at Delphi.
In cryptography, a pseudorandom function family, abbreviated PRF, is a collection of efficiently-computable functions which emulate a random oracle in the following way: no efficient algorithm can distinguish (with significant advantage) between a function chosen randomly from the PRF family and a random oracle (a function whose outputs are fixed completely at random).
The most common example of this technique, known as the random oracle model, [1] [2] involves replacing a cryptographic hash function with a genuinely random function. Another example is the generic group model , [ 3 ] [ 4 ] where the adversary is given access to a randomly chosen encoding of a group , instead of the finite field or elliptic ...
A sequence which is random relative to the oracle () is called n-random; a sequence is 1-random, therefore, if and only if it is Martin-Löf random. A sequence which is n-random for every n is called arithmetically random. The n-random sequences sometimes arise when considering more complicated properties.
It appears in sample SQL for other operations in the documentation. SQLite: A VIEW named "dual" that works the same as the Oracle "dual" table can be created as follows: CREATE VIEW dual AS SELECT 'x' AS dummy; SAP HANA has a table called DUMMY that works the same as the Oracle "dual" table. Teradata database does not require a dummy table ...
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All Cerner Millennium health information technology software uses CCL/Discern Explorer to select from, insert into, update into and delete from a Cerner Millennium database and allows a programmer to fetch data from an Oracle database and display it as the user wants to see. With features like Record Structure and subroutines it allows a user ...