define hashcode
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- A hash code is a numeric value that is used to insert and identify an object in a hash-based collection such as the Dictionary<TKey, TValue> class, the Hashtable class, or a type derived from the DictionaryBase class.
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encryption encryption. (computer science). The coding of a clear text message by a transmitting unit so as to prevent unauthorized eavesdropping along the transmission line; the receiving unit uses the same algorithm as the transmitting unit to decode the incoming message. (algorithm, cryptography).
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cryptography Cryptography is a method of storing and transmitting data in a particular form so that only those for whom it is intended can read and process it. The term is most often associated with scrambling ...
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What's Done in the Dark What's Done in the Dark - performed by Latrice Pace You Ain't Seen Nothing Yet - performed by Terrell Carter Struggle No More - performed by Ahmad Jamal McGhee Jehovah Jireh - performed by Chandra Currelley I'm Going Through - performed by Chandra Currelley I Know It Was the Blood - performed by Latrice Pace
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- Typically, a cryptographic hash function H has three properties: 1  Preimage resistance: Given H(x), it's hard to find x. 2  Second preimage resistance: Given m1, it's hard to find another m2 such that H(m1)=H(m2) 3  Collision resistance: It's hard to find any two distinct messages m1, m2 such that H(m1)=H(m2).
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Hash Function A hash function takes a group of characters (called a key) and maps it to a value of a certain length (called a hash value or hash). The hash value is representative of the original string of characters, but is normally smaller than the original. Hashing is done for indexing and locating items in databases because it is easier to find the shorter hash value than the longer string. Hashing is also used in encryption.
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- Freebase(0.00 / 0 votes)Rate this definition: A barcode is an optical machine-readable representation of data relating to the object to which it is attached. Originally barcodes systematically represented data by varying the widths and spacings of parallel lines, and may be referred to as linear or one-dimensional.
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Difference between âone-way functionâ and âcryptographic hash functionâ Now you can say a one-way hash function is a hash function (using the less restricted definition) that possesses properties 1 and 2; that is, it is an easy-to-compute compression function that possesses preimage resistance and second-preimage resistance. In other words, the function can only be computed one way.
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- a hash function is any function that can be used to map data of arbitrary size to data of fixed size the values returned by a hash function are called hash values hash codes hash sums or simply hashes one use is a data structure called a hash table widely used in computer software for rapid data lookuphash functions accelerate table or database lookup by detecting duplicated records in a large filehe values returned by a hash function are called hash values hash codes hash sums or simply hashes one use is a data structure called a hash table widely used in computer software for rapid data lookup
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Definitions &Translations Freebase(0.00 / 0 votes)Rate this definition: Barcode. A barcode is an optical machine-readable representation of data relating to the object to which it is attached. Originally barcodes systematically represented data by varying the widths and spacings of parallel lines, and may be referred to as linear or one-dimensional.
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Definition of Hashset - class java.util..HashSet public class HashSet extends AbstractSet implements Set , Cloneable , Serializable Tree:java.lang.Object - java.util.AbstractCollection - java.util.AbstractSet - java.util.HashSet This class implements the interface, backed by a hash table (actually a instance). It makes no guarantees as to the iteration order of the set; in particular, it does not guarantee that the order will remain constant over time.
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Hash function A hash function is any function that can be used to map data of arbitrary size to data of fixed size. The values returned by a hash function are called hash values, hash codes, hash sums, or simply hashes. One use is a data structure called a hash table, widely used in computer software for rapid data lookup.hen storing records in a large unsorted file, one may use a hash function to map each record to an index into a table T, and to collect in each bucket T [ i ] a list of the numbers of all records with the same hash value i. Once the table is complete, any two duplicate records will end up in the same bucket.
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- A hashtag is a type of label or metadata tag used on social network and microblogging services which makes it easier for users to find messages with a specific theme or content. hashtag is a type of label or metadata tag used on social network and microblogging services which makes it easier for users to find messages with a specific theme or content.
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Comparing Objects Note that equal objects must have equal hash codes. Therefore, when overriding the equals method, you must also override the hashCode method. Failure to do so violates the general contract for the hashCode method, and any classes that use the hash code, such as HashMap will not function properly.
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What is hash code in C# and what is the significance of GetHashCode method? A hash code is a numeric value that is used to insert and identify an object in a hash-based collection such as the Dictionary<TKey, TValue> class, the Hashtable class, or a type derived from the DictionaryBase class. The method provides this hash code for algorithms that need quick checks of object equality.
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Cryptography Basics A cryptographic algorithm (also known as a cipher) is a step by step sequence of mathematical calculations used to encrypt and decrypt information. There are currently three different types of cryptographic algorithms; hashing algorithms, symmetric-key algorithms and asymmetric key algorithms.
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Hashtable Class Hashtable(IDictionary, Single) Initializes a new instance of the class by copying the elements from the specified dictionary to the new object. The new object has an initial capacity equal to the number of elements copied, and uses the specified load factor, and the default hash code provider and comparer.
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- Pseudocode is a description of a computer programming algorithm that uses the structural conventions of programming languages, but omits detailed subroutines or language-specific syntax. It can also refer to a high level 'language' whose aim is to generalise the logic and program flow of a computer program.
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Hashing Hashing. 1. When referring to databases, hashing is a method of sorting and indexing data. The idea behind hashing is to allow large amounts of data to be indexed using keywords or keys commonly created by complex formulas.Hashing allows for a large amount of information to be searched and listed.ashing. 1. When referring to databases, hashing is a method of sorting and indexing data. The idea behind hashing is to allow large amounts of data to be indexed using keywords or keys commonly created by complex formulas.
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Cryptographic Hash Function A cryptographic hash function is a kind of algorithm that can be run on a piece of data, like an individual file or a password, producing a value called a checksum.The main use of a cryptographic hash function is to verify the authenticity of a piece of data.Two files can be assured to be identical only if the checksums generated from each file, using the same cryptographic hash function, are identical.he main use of a cryptographic hash function is to verify the authenticity of a piece of data. Two files can be assured to be identical only if the checksums generated from each file, using the same cryptographic hash function, are identical.
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What is Cryptographic Hashing? MD5, SHA, and More When you hear the term hashing in the digital world, it’s usually referring to a cryptographic hash. This is essentially the “fingerprint” of some data. A hash is a string of random-looking characters that uniquely identifies the data in question, much like your fingerprint identifies you.You can hash any data, whether it’s a file (like a music MP3 or spreadsheet) or just a string of characters (like a password).t stores the hash of the password and forgets what you actually typed. Then the next time you type in your password, it hashes what you type in and checks it against the stored hash. If the hashes match, it lets you in. Your actual password is never saved on the computer or website.
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- bluetalon hashing is the transformation of a string of character s into a usually shorter fixed length value or key that represents the original string hashing is used to index and retrieve items in a database because it is faster to find the item using the shorter hashed key than to find it using the original valueit is also used in many encryption algorithmsashing is used to index and retrieve items in a database because it is faster to find the item using the shorter hashed key than to find it using the original value it is also used in many encryption algorithms
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- Hashing is a better option, especially with the judicious use of salt, according to mathematician Andrew Regenscheid and computer scientist John Kelsey of the National Institute of Standards and Technology’s Computer Security Division. Encryption is a two-way function; what is encrypted can be decrypted with the proper key. Hashing, however, is a one-way function that scrambles plain text to produce a unique message digest. With a properly designed algorithm, there is no way to reverse the hashing process to reveal the original password.
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Why AES is not used for secure hashing, instead of SHA-x? A hash function is a single, fully defined, computable function which takes as input bit sequences of arbitrary length, and outputs values of a fixed length r (e.g. r = 256 bits for SHA-256). There is no key, no family of function, just a unique function which anybody can compute.
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- In this regard there is a rule of thumb that if you are going to override the one of the methods(ie equals() and hashCode()) , you have to override the both otherwise it is a violation of contract made for equals() and hashCode(). Please refer to the Sun’s java docs for the method’s contract.owever it is possible to override the hashCode method in your implementation class. equals(). This particular method is used to make equal comparison between two objects. There are two types of comparisons in Java.
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Data Structures/Hash Tables A hash table, or a hash map, is a data structure that associates keys with values. The primary operation it supports efficiently is a lookup: given a key (e.g. a person's name), find the corresponding value (e.g. that person's telephone number).