Software Function Graphic Digital Signature Tool Professional Edition supports digital signatures of applications, ActiveX controls and 64-bit drivers, including all functions of Microsoft signature tool. Features: signature test: built-in free test certificate, one-click installation, signature test. Certificate management: backup and restore certificates at any time. Signature rules: original signature rules, one-key digital signature. Digital signature: code signing, with various driver signatures, supports direct drag-and-drop signatures of files or folders. Time stamp: Built-in VeriSign, Thawte time stamp server. Signature verification: Check the signature status to ensure the validity of the digital signature.