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 ?
aspx) announced this week it no longer will support the SHA-1 hashing function used to encrypt information in its Internet Explorer and Edge web browsers.
5 features such as the highly anticipated Copy-Fields action, as well as other new features that significantly boost the performance of OpenFlow based applications, such as a hashing function on user-defined ordered lists, MPLS payload matching and broader encapsulation/decapsulation support for layer 2 tunneling protocols.
Dynamic hash table is usually double the number of slot growth after the conflict, while hashing function has changed after growth, so elements of the old slot should be reposition; this realization method is the principles of "hash_map" function in the standard library.
Then, taking into account the above, we performed the software implementation of the Nearly Optimal sFFT algorithm for the noisy case presented in [2] by considering the mathematical tools: pseudo-random spectral permutation [1],[7], flat filtering window [2] and hashing function [1],[2]; and using the procedures for approximate sparse recovery [6],[2] and median estimation [1],[2],[7].
Though hashing is being used for deduplication, they were many instances where non-similar files were deleted because of a wrong notion of the hashing function.
In addition, the task distribution format and the hashing function cannot be changed in this implementation by using API--it requires changing the makeup code.
Useer's Password: "Giants" [down arrow] Hashing Function (encryption only; no decryption) [down arrow] Hashed Value: "66tt" Exhibit 4 Hashed Passwords: Vulnerable to Rainbow Tables The password table (below, left) contains a hypothetical hashed value of each password in the clear-text table in Exhibit 1.
Indeed, given any hashing function, an adversary may always choose data that will result in an appalling distribution of hash values.
While the passwords were encrypted using the secure hashing function bcrypt, CloudPets had no standard for password strength; users could have the password "a" and it would be accepted-making the encryption relatively easy to crack for the simple passwords.
This hashing function needs not to be limited to strings, we have been using it to hash addresses, strings and any other data structures that we use as keys in our CAD software.
SHA-1 is a hashing function used to encrypt information.
In the literature on hashing techniques, most authors spend little time discussing any particular hashing function, but make do with an allusion to Knuth [3] in their haste to get to the interesting topics of table organization and collision resolution.