7. The method of claim 1 , further comprising: determining, when the adult keyword corresponding to the extracted character string is found in the adult keyword database, whether the website corresponding to the adult keyword is registered as an adult site, wherein controlling the process for the website comprises taking measures against a registrant of the website that has been determined to be an adult site when the website is not registered as an adult site.
7. The method of claim 1 , further comprising: determining, when the adult keyword corresponding to the extracted character string is found in the adult keyword database, whether the website corresponding to the adult keyword is registered as an adult site, wherein controlling the process for the website comprises taking measures against a registrant of the website that has been determined to be an adult site when the website is not registered as an adult site. 9. The method of claim 7 , wherein taking measure comprises extracting information for additional websites registered to the registrant of the website, and determining whether at least one of the additional websites contains an adult keyword.