hash function

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hash function

(programming)
A hash coding function which assigns a data item distinguished by some "key" into one of a number of possible "hash buckets" in a hash table. The hash function is usually combined with another more precise function.

For example a program might take a string of letters and put it in one of twenty six lists depending on its first letter. Ideally, a hash function should distribute items evenly between the buckets to reduce the number of hash collisions. If, for example, the strings were names beginning with "Mr.", "Miss" or "Mrs." then taking the first letter would be a very poor hash function because all names would hash the same.

hash function

An algorithm that turns a variable amount of text into a small, fixed-length value called a "hash value," "hash code" or "digest." Hash functions are widely used to create codes for digital signatures and message authentication (see cryptographic hash function). Hash functions are also employed to create lookup tables (see hash table) as well as spam analysis (see hash buster).
References in periodicals archive ?
The HSM uses hardware-based symmetric and asymmetric encryption algorithms as well as hash functions (AES-128, ECC 256, SHA2).
At the same time, the outsourced computation can be verified by two hash functions.
The Blake hash function like many other hash functions was designed with the intent of making it capable of running at high speed.
A typical class of random hash functions is the following class.
A common misconception by some self-proclaimed IT experts is that hash codes are encrypted data because they read somewhere that hash codes are produced by cryptographic hash functions.
In [10, 11], the LSH functions replace the random hash functions of the BF to implement the similarity search, while [10,11] only can deal with numerical coordinates and return the elements whose distances from the query are at most CR distance in Euclidean spaces, which lead to false negative probability (FNP).
a) Full-fledged protocols can incorporate the traditional cryptographical algorithms and solutions, like one way hash functions, public or private key cryptography, and so forth.
The one-way characteristic of hash functions can ensure that disclosure of the "substitute of the system-side OTP' will not lead back to the actual OTP.
The topics include radio frequency identification (RFID) authentication protocols and wide-strong privacy, a secure elliptical curve based RFID ownership transfer scheme with controlled delegations, a framework for securing RFID transmissions by varying transmitted reader's power, a comparative study of stream cyphers and hash functions of RFID authentications, and a remote attestation mechanism for embedded devices based on physical unclonable functions.
These passwords are stored as cryptographic hash functions, in which passwords of any length are converted into strings of bits of uniform length.
SharkSSL implements the new Secure Hash Algorithm- 256 (SHA-256), which replaces outdated hash functions and can be used to verify the integrity of copies of the original data without compromising the source.