... front-end application; rather, Google hackers troll the Internet looking for bits andpieces of database information leaked from potentially vulnerable servers.These bits andpieces of information ... Digging • Chapter 4 139 Continued452 _Google_ 2e_04.qxd 10/5/07 12:42 PM Page 139 contains the words username password and e-mail, there’s a good chance the spreadsheet con-tains sensitive data ... Office Document File TypesFile Type ExtensionAdobe Portable Document Format PdfAdobe PostScript PsLotus 1-2 -3 wk1, wk2, wk3, wk4, wk5, wki, wks, wkuLotus WordPro LwpMacWrite MwMicrosoft Excel...