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A key generator ( key-gen) is a computer program that generates a , such as a , necessary to activate for use of a software application. Keygens may be legitimately distributed by software manufacturers for licensing software in commercial environments where software has been licensed in bulk for an entire site or enterprise, or they may be distributed illegitimately in circumstances of copyright infringement or software piracy. Illegitimate key generators are typically distributed by software crackers in the and . These keygens often play "Keygen music", which may include the genres or in the background and have artistic user interfaces.


Software licensing
A /ref> seeking to prevent unauthorized use of the software by issuing a code sequence that must be entered into the application when prompted or stored in its configuration.


Key verification
Many programs attempt to verify or validate licensing keys over the Internet by establishing a session with a licensing application of the software publisher. Advanced keygens bypass this mechanism, and include additional features for key verification, for example by generating the validation data which would otherwise be returned by an activation server. If the software offers phone activation then the keygen could generate the correct activation code to finish activation. Another method that has been used is activation server emulation, this patches the program memory to use the keygen as activation server.


Multi-keygen
A multi-keygen is a keygen that offers key generation for multiple software applications. Multi-keygens are sometimes released over singular keygens if a series of products requires the same for generating . In this case, only a single value encoded within the key has to be changed in order to target a different product.


Authors and distribution
Unauthorised keygens that typically violate software licensing terms are written by programmers who engage in reverse engineering and software cracking, often called crackers, to circumvent of software or digital rights management for .

Keygens are available for download on sites or through (P2P) networks.


Malware keygens
Many unauthorised keygens, available through P2P networks or otherwise, contain . Microsoft Security Intelligence Report Volume 13, p14 These key generators may or may not generate a valid key, but the embedded malware loaded invisibly at the same time may, for example, be a version of CryptoLocker ().

Antivirus software may discover malware embedded in keygens; such software often also identifies unauthorised keygens which do not contain a payload as potentially unwanted software, often labelling them with a name such as Win32/Keygen or Win32/Gendows.


See also
  • BSA (The Software Alliance)
  • Canadian Alliance Against Software Theft
  • Free Software Foundation


External links

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