These keygens often play music (taking from the tradition of cracktros), which may include the genres dubstep, chiptunes, sampled loops or anything that the programmer desires.
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.
These tools simplify the process of obtaining activation keys for users who need access to various software products within the same suite or developed by the same company.
However, the use of multi-keygens often violates software licensing agreements or constitutes copyright infringement when unauthorized, and may pose risks such as malware or compromised system security.
[3] A program designed to assist hacking is defined as HackTool.Win32.HackAV or not-a-virus:Keygen from Kaspersky Labs or as HackTool:Win32/Keygen by Microsoft Malware Protection Center.