Microsoft Windows
TCOS Card Module for NetKey/ IDKey applications with MS BaseCSP for Windows 2000 and XP (with MSDN software update 909520 for MS BaseCSP, http://support.microsoft.com/kb/909520/de). Under Windows XP, BaseCSP is already an integral part of SP 1 and also supports secure PIN entry via a PIN keypad connected to a card reader.

PKCS#11 SDK for integrating the SigG application (for qualified signatures), NetKey/ IDKey application (for advanced signatures, decryption and authentication) and an ELSTER module*) for ELSTER control software.

*) Only if ELSTER certificate issuer is approved

Linux
PKCS#11 SDK is provided for LINUX (SO file) and OpenBSD to allow simple access to card functionality.

MacOS
PKCS#11 SDK is provided for MacOS from 10.x onwards to allow simple access to card functionality.