Xenon is software to perform covert Internet searches, presently in use by taxing authorities to investigate the possibilities of tax evasion by various revenue producing web sites (online shops, gambling sites, or pornography sites) and clients selling goods on on-line auction sites. The software uses time–controlled web spiders to avoid likely countermeasures by the webmasters of the targeted site.
References
Xenon (program) Wikipedia(Text) CC BY-SA