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Software identifier
The SoftWare Hash IDentifier (SWHID) is a persistent identifier used to uniquely identify a particular piece of software source code and its version. SWHID
SoftWare_Hash_IDentifier
Long-lasting digital name
Extensible Resource Identifiers (XRIs) Persistent Uniform Resource Locators (PURLs) Software Hash Identifier (SWHID) Wikidata Identifier (e.g QIDs) Combined
Persistent_identifier
Public initiative for software archival
archive is associated with a SoftWare Hash IDentifier (SWHID). In order to increase the chances of preserving the Software Heritage archive over the long
Software_Heritage
interpretation and attributes of a set of identifiers. A definition of an identifier is a declaration for that identifier that: for an object [variable or constant]
Glossary_of_computer_science
Non-cryptographic hash function
fnv-1 is hash := FNV_offset_basis for each byte_of_data to be hashed do hash := hash × FNV_prime hash := hash XOR byte_of_data return hash In the above
Fowler–Noll–Vo_hash_function
128-bit number used to identify information in computer systems
universally unique identifier (UUID) is a 128-bit number used to identify information in computer systems. The term globally unique identifier (GUID) is also
Universally_unique_identifier
American blogger, product consultant and speaker (born 1981)
prefixed with a hash symbol (as opposed to those local to a server, which use an ampersand). HTML has used # as a fragment identifier from the very start
Chris_Messina_(inventor)
Algorithmic technique using hashing
In computer science, locality-sensitive hashing (LSH) is a fuzzy hashing technique that hashes similar input items into the same "buckets" with high probability
Locality-sensitive_hashing
A strongly typed identifier is user-defined data type which serves as an identifier or key that is strongly typed. This is a solution to the "primitive
Strongly_typed_identifier
Hash function that is suitable for use in cryptography
in a very different hash, meaning that it functions as an efficient and consistent way to check if two copies of data or software match. Typically, the
Cryptographic_hash_function
Mapping arbitrary data to fixed-size values
output. The values returned by a hash function are called hash values, hash codes, (hash/message) digests, or simply hashes. The values are usually used to
Hash_function
Type of data structure
the above picture hash 0 is the result of hashing the concatenation of hash 0-0 and hash 0-1. That is, hash 0 = hash( hash 0-0 + hash 0-1 ) where "+" denotes
Merkle_tree
Identifier for chemical substances
The International Chemical Identifier (InChI, pronounced /ˈɪntʃiː/ IN-chee) is a textual identifier for chemical substances, designed to provide a standard
International Chemical Identifier
International_Chemical_Identifier
Technique to uniquely identify a video recording
Video fingerprinting or video hashing are a class of dimension reduction techniques in which a system identifies, extracts and then summarizes characteristic
Digital_video_fingerprinting
Message-digest hashing algorithm
is a widely used hash function producing a 128-bit hash value. MD5 was designed by Ronald Rivest in 1991 to replace an earlier hash function MD4, and
MD5
Anti-spam hashing algorithm
fuzzy hashing in 2006, that used the algorithms of spamsum by Andrew Tridgell (2002). Several implementations of Nilsimsa exist as open-source software. cmeclax
Nilsimsa
Class of fingerprinting algorithm
major software companies, NGOs and law enforcement agencies around the world. In June 2016 Azadeh Amir Asgari published work on robust image hash spoofing
Perceptual_hashing
Hash functions
released as public domain-like software under the CC0. SipHash is used in hash table implementations of various software: Programming languages JavaScript
SipHash
Label to identify a network interface of a computer or other network node
populated with a 64-bit interface identifier. It can be derived from these sources: As the name "interface identifier" suggests, it can be the network
IPv6_address
Content-addressable, peer-to-peer hypermedia distribution protocol
sharing data using a distributed hash table to store provider information. By using content addressing, IPFS uniquely identifies each file in a global namespace
InterPlanetary_File_System
Security model
account's signature chain that contains the identifier history. The identifier used in Keybase is either the hash of the root of the user's signature chain
Trust_on_first_use
Typographic symbol (#)
The symbol # is known as the number sign, hash, and the pound sign and has a variety of other names. The symbol has historically been used for a wide range
Number_sign
Software development tool
detection is done by hashing different kinds of information that should be unique for the compilation and then using the hash sum to identify the cached output
Ccache
Email authentication method designed to associate a domain with a message stream
body hash (optionally limited to the first l octets of the body), d for the signing domain, and s for the selector. An Agent or User Identifier (AUID)
DomainKeys_Identified_Mail
Digital identifier derived from the data by an algorithm
National Software Reference Library, that uses cryptographic hash functions to fingerprint files and map them to software products. The HashKeeper database
Fingerprint_(computing)
Associative array for storing key–value pairs
is hashed and the resulting hash indicates where the corresponding value is stored. A map implemented by a hash table is called a hash map. Most hash table
Hash_table
Cryptographic hash function
two MD4 hash operations. A theoretical preimage attack also exists. A variant of MD4 is used in the ed2k URI scheme to provide a unique identifier for a
MD4
Distributed version control software system
resistant to this attack. A plan for hash function transition is being written since February 2020. Free and open-source software portal Linux portal Internet
Git
Suite of Microsoft security protocols
NTv2. Both LMv2 and NTv2 hash the client and server challenge with the NT hash of the user's password and other identifying information. The exact formula
NTLM
Specific software-based key for a computer program
considered third-party (cheating) software by the game's server. [citation needed] Biometric passport Cryptographic hash function Intel Upgrade Service Keygen
Product_key
Automatically generated avatar
An Identicon is a visual representation of a hash value, usually of an IP address, that serves to identify a user of a computer system as an effectively
Identicon
File sharing URL
BitTorrent) at once. eD2k links include file hashes, as these hashes can be used as a unique identifier for files within the network, so even if the linked-to
Ed2k_URI_scheme
Symbol "#!", used in computing
character sequence #!, consisting of the characters number sign (also known as hash or octothorpe) and exclamation mark (also known as bang), at the beginning
Shebang_(Unix)
Cryptographic hash function
cryptography, SHA-1 (Secure Hash Algorithm 1) is a hash function which takes an input and produces a 160-bit (20-byte) hash value known as a message digest
SHA-1
Permanent web hyperlink
content-syndication software systems support such links. Sometimes URL shortening is used to create them. A permalink is a type of persistent identifier and the word
Permalink
Image identification technology
it creates unique hashes to represent each image, which can then be used to identify other instances of those images. The hashing method initially relied
PhotoDNA
Obsolete cryptographic hash function
The MD2 Message-Digest Algorithm is an obsolete cryptographic hash function developed by Ronald Rivest in 1989. The algorithm is optimized for 8-bit computers
MD2_(hash_function)
Practice and study of secure communication techniques
and ensure that software updates are truly from the system maker. Instead of storing plaintext passwords, computer systems store hashes thereof; then,
Cryptography
Secure area of a main processor
software not signed by the trusted party's key from accessing the privileged features. The public key of the vendor is provided at runtime and hashed;
Trusted_execution_environment
Scheme that defines the format of magnet links
format of magnet links, a de facto standard for identifying files (URN) by their content, via cryptographic hash value rather than by their location. Although
Magnet_URI_scheme
Format for legal agreements that is executable in software
[better source needed] It is robust through the use of identification by a cryptographic hash function, transparent through the use of readable text for legal prose, and
Ricardian_contract
Data structure that maps virtual addresses with physical addresses
process; the OS may avoid reusing per-process identifier values to delay facing this. Alternatively, per-process hash tables may be used, but they are impractical
Page_table
BitTorrent-related file format
Changes to other portions of the torrent do not affect the hash. This hash is used to identify the torrent to other peers via DHT and to the tracker. It
Torrent_file
Project of the US National Institute of Standards and Technology
Reference Data Set. The NSRL collects software from various sources and computes message digests, or cryptographic hash values, from them. The digests are
National Software Reference Library
National_Software_Reference_Library
Cellphone identification code
The International Mobile Equipment Identity (IMEI) is a numeric identifier, usually unique, for 3GPP and iDEN mobile phones, as well as some satellite
International Mobile Equipment Identity
International_Mobile_Equipment_Identity
Open standard for software bill of materials
license identifier can be added to the top of source code files as a short string unambiguously declaring the license used. The SPDX-License-Identifier syntax
Software Package Data Exchange
Software_Package_Data_Exchange
Password-based key derivation function
\____________________/\_____________________________/ Alg Cost Salt Hash Where: $2a$: The hash algorithm identifier (bcrypt) 12: Input cost (212 i.e. 4096 rounds) R9h/cIPz0gi
Bcrypt
Peer-to-peer file sharing network
regularly. Files on the eDonkey network are uniquely identified using MD4 root hash of an MD4 hash list of the file. This treats files with identical content
EDonkey_network
Free and open-source anonymity network based on onion routing
enabling anonymous communication. It is built on free and open-source software run by over seven thousand volunteer-operated relays worldwide, as well
Tor_(network)
Software that verifies hashes
128-bit MD5 hashes, as described in RFC 1321. The MD5 hash functions as a compact digital fingerprint of a file. As with all such hashing algorithms,
Md5sum
Data structure for approximate set membership
error-free hash could be used to eliminate all unnecessary disk accesses; on the other hand, with limited memory, Bloom's technique uses a smaller hash area
Bloom_filter
Microsoft network operating system
subsequent to software releases supporting the feature becoming available have contributed to some organisations continuing to use LM Hashing in their environments
LAN_Manager
Free and open source project building an anonymous network
I2P with its internal router or use an external router. To fight spam, "hash payments" (proof of CPU work) is computed for every published item. i2pd
I2P
Free and open-source disk encryption utility
addressed. VeraCrypt includes optimizations to the original cryptographic hash functions and ciphers, which boost performance on modern central processing
VeraCrypt
Framework for decentralized, peer-to-peer networking which is part of the GNU Project
contains resource identifier, reply address, priority and TTL (Time-to-Live). Resource identifier of datum Q {\displaystyle Q} is a triple-hash H ( H ( H (
GNUnet
Type of data storage mechanism
systems work by passing the content of the file through a cryptographic hash function to generate a unique key, the "content address". The file system's
Content-addressable_storage
Computer network management and monitoring protocol
sniffing. SNMP v2 allows password hashing with MD5, but this has to be configured. Virtually all network management software supports SNMP v1, but not necessarily
Simple Network Management Protocol
Simple_Network_Management_Protocol
Web service providing individuals with a "Globally Recognized Avatar"
not a good idea". www.developer.it. Retrieved 2025-12-24. "Creating identifier (hash)". Gravatar For Developers. 2023-07-17. Retrieved 2025-12-24. Madden
Gravatar
Data processing technique to eliminate duplicate copies of repeating data
data is assigned an identification, calculated by the software, typically using cryptographic hash functions. In many implementations, the assumption is
Data_deduplication
Rules governing the functioning of cryptocurrency
produces a hash code that follows the rules of the bitcoin protocol. Creating this hash requires expensive energy, but a network node can verify the hash is valid
Bitcoin_protocol
GNU replacement for the Bourne shell
Supported by the Free Software Foundation and created in 1989 by Brian Fox for the GNU Project, it is designed as a completely free software alternative for
Bash_(Unix_shell)
Person who uses a computer or network service
file /etc/passwd, while user passwords may be stored at /etc/shadow in its hashed form. On Microsoft Windows, user passwords can be managed within the Credential
User_(computing)
Free software re-implementation of the SMB networking protocol
The last release for ReactOS was in 2009. Free and open-source software portal LM hash SSLBridge GPL-3.0-or-later and LGPL-3.0-or-later since 2008-07-01
Samba_(software)
Short sequence of bytes used to authenticate or look up a longer public key
short sequence of bytes used to identify a longer public key. Fingerprints are created by applying a cryptographic hash function to a public key. Since
Public_key_fingerprint
Computer hardware technology
Measurements consist of a cryptographic hash using a hashing algorithm; the TPM v1.0 specification uses the SHA-1 hashing algorithm. More recent TPM versions
Trusted_Execution_Technology
Key derivation function of password hash
two characters are the salt itself and the rest is the hashed result), and identifies the hash algorithm used (defaulting to the "traditional" one explained
Crypt_(C)
Mathematical scheme for verifying the authenticity of digital documents
to an attack. In the random oracle model, hash-then-sign (an idealized version of that practice where hash and padding combined have close to N possible
Digital_signature
Protocol for distributed hash table
{\displaystyle m} -bit identifier using consistent hashing. The SHA-1 algorithm is the base hashing function for consistent hashing. Consistent hashing is integral
Chord_(peer-to-peer)
Password recovery software
hashes SHA-2 hashes RIPEMD-160 hashes Kerberos 5 hashes RADIUS shared key hashes IKE PSK hashes MSSQL hashes MySQL hashes Oracle hashes SIP hashes Some virus
Cain_and_Abel_(software)
Archive file format
file spanning. It was developed in 1993 by Russian software engineer Eugene Roshal and the software is licensed by win.rar GmbH. The name RAR stands for
RAR_(file_format)
Network protocol that provides file management over any reliable data stream
File Transfer Protocol, Draft 10, June 2005 – Extensions "vendor-id", "md5-hash", "space-available", "home-directory" removed. ACL changes. SSH File Transfer
SSH_File_Transfer_Protocol
November 2013 "Changesets". March Hare Software Ltd. Retrieved 8 May 2012. Fossil Technical Overview Fossil Hash Policy "Git 2.51 Released with Performance
Comparison of version-control software
Comparison_of_version-control_software
needed] A Globally unique identifier (GUID) is a 16 bytes field in the Gnutella message header, which uniquely identifies every Gnutella message. The
Privacy in file sharing networks
Privacy_in_file_sharing_networks
American multinational software company
formerly Adobe Systems Incorporated, is an American multinational computer software company based in San Jose, California. It offers a wide range of programs
Adobe_Inc.
General-purpose programming language
language, allowing optional static typing. As of 2026[update], the Python Software Foundation supports Python 3.11, 3.12, 3.13, and 3.14, following the project's
Python_(programming_language)
Software build automation tool
In software development, Make is a command-line interface software tool that performs actions ordered by configured dependencies as defined in a configuration
Make_(software)
Tool to change passwords on Unix-like OSes
through a key derivation function to create a hashed version of the new password, which is saved. Only the hashed version is stored; the entered password is
Passwd
Forensic database application
algorithm to establish unique numeric identifiers (hash values) for files "known to be good" and "known to be bad." The HashKeeper application was developed
HashKeeper
Cross-platform instant messaging service
contest could not be won even with completely broken algorithms such as MD2 (hash function) used as key stream extractor, and primitives such as the Dual EC
Telegram_(software)
Text used for user authentication to prove identity
password handling software runs through a cryptographic hash algorithm, and if the hash value generated from the user's entry matches the hash stored in the
Password
Authentication networking protocol
code, the identifier, the length, the authenticator and the attributes. Assigned RADIUS Codes (decimal) include the following: The Identifier field aids
RADIUS
Network storage system
network storage system that permanently stores data blocks. A 160-bit SHA-1 hash of the data (called score by Venti) acts as the address of the data. This
Venti_(software)
Object-oriented programming language
components of a multi-word identifier, as in average_temperature. The specification of Eiffel includes guidelines for displaying software texts in typeset formats:
Eiffel_(programming_language)
Computing error resulting from the use of identically-named variables
variables, variable data items that are local to a module Name mangling see Hash table#Collision resolution for details "Getting Started" (lesson for C++)
Name_collision
Address on the World Wide Web
hash (#). The fragment contains a fragment identifier providing direction to a secondary resource, such as a section heading in an article identified
URL
Network attack in which valid data transmission is repeated or delayed
transformation like hashing, or even salting, the password); meanwhile, Eve is eavesdropping on the conversation and keeps the password (or the hash). After the
Replay_attack
Rendition SGX—Software Guard eXtensions SHA—Secure Hash Algorithms SHA-1—Secure Hash Algorithm 1 SHA-2—Secure Hash Algorithm 2 SHA-3—Secure Hash Algorithm
List of computing and IT abbreviations
List_of_computing_and_IT_abbreviations
database are referenced by their object identifier which is itself managed via a static hash index. A static hash index is simply an array index where the
ObjectDatabase++
Reliable digital data delivery methods on unreliable channels
that will yield the same hash value. If an attacker can change not only the message but also the hash value, then a keyed hash or message authentication
Error detection and correction
Error_detection_and_correction
Software for editing the metadata of media files
monitoring, sound effect library management, and video identification. In hash function, for audio identification, such as finding out whether an MP3 file
Tag_editor
Privacy-focused encrypted messaging app
of all possible hash inputs to hash outputs and reverse the mapping because of the limited preimage space (the set of all possible hash inputs) of phone
Signal_(software)
incrementing numbers as identifiers. Distributed version control systems, such as Git, generate a unique identifier by applying a cryptographic hash function to the
Changeset
Video-sharing platform
these views came from a relatively small number of videos; according to a software engineer at that time, 30% of videos accounted for 99% of views on the
YouTube
Software authentication
corrupted since it was signed. The process employs the use of a cryptographic hash to validate authenticity and integrity. Code signing can provide several
Code_signing
Overview of computer engineering topics
Zero-order hold Data compression Modulation order Phase-shift keying Hash function List of hash functions String searching algorithm Avalanche effect Rabin–Karp
Computer engineering compendium
Computer_engineering_compendium
Feature of computer terminals
characters replaced. For instance, the UK standard simply replaced ASCII's hash mark, #, with the pound symbol, £. This normally led to different models
National Replacement Character Set
National_Replacement_Character_Set
moxibustion devices ISO/IEC 18670:2025 Information technology — SoftWare Hash IDentifier (SWHID) Specification V1.2 ISO 18682:2016 Intelligent transport
List of ISO standards 18000–19999
List_of_ISO_standards_18000–19999
Peer-to-peer overlay network
Mainline DHT is the name given to the Kademlia-based distributed hash table (DHT) used by BitTorrent clients to find peers via the BitTorrent protocol
Mainline_DHT
Ability to easily switch cryptographic primitives
key type, key length, and a hash algorithm. X.509 version v.3, with key type RSA, a 1024-bit key length, and the SHA-1 hash algorithm were found by NIST
Cryptographic_agility
Software library
data structures, such as memory chunks, doubly and singly linked lists, hash tables, dynamic strings and string utilities, such as a lexical scanner,
GLib
travel, tourism, insurance
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