PDFBlackbox, available editions

PDF is a portable format for document storing and distribution. Among other features PDF specification defines the procedures for encryption and signing of the documents. The main function of PDFBlackbox is to sign and timestamp, encrypt, decrypt and verify Acrobat PDF documents using X.509 certificates, RSA keys or passwords.

PDFBlackbox is available in several editions for various software platforms.

.NET edition. Built with Chrome, this edition of PDFBlackbox includes pure managed components, carefully optimized to achieve maximum performance, comparable to native processor code.
.NET edition requires .NET Framework 1.1, .NET Framework 2.0, .NET Framework 3.0, .NET Framework 3.5, Mono 1.0, Mono 2.0, .NET CF 1.0, .NET CF 2.0 or .NET CF 3.5.
.NET edition can be used on Windows desktop systems, Windows Mobile PDAs and on Linux systems with Mono installed.

VCL edition. Blazingly fast native Delphi (Pascal) components for building native Windows and Linux applications. Usable with Delphi, Kylix or FreePascal (Win32 and Linux/x86).
VCL edition works on any computer with Windows 98 and later or with Linux kernel 2.4 and later.