Short description of SFTPBlackbox (ActiveX/DLL) 6.1: SFTPBlackbox (ActiveX edition) is a comprehensive collection of native components that add client-side support for SFTP (Secure File Transfer Protocol) to your Windows applications. SFTPBlackbox also includes support for SSH family of protocols and for PKI (Public Key Infrastructure), i.e. X.509 certificates, requests and revokation lists. ActiveX edition can be used with Visual Basic, C++ or other development tool that supports ActiveX controls.