The Trusted Computing Group (TCG), successor to the Trusted Computing Platform Alliance (TCPA), is an initiative started by AMD, Hewlett-Packard, IBM, Infineon, Intel, Microsoft, and Sun Microsystems to implement Trusted Computing. Many others followed.

Overview
Chipmakers have developed varying implementations that integrate the TPM functions into a normal chipset. Intel's is called trusted execution technology . AMD's is called Secure Virtual Machine (SVM) [2]. Transmeta's is called Transmeta Security eXtensions (TSX). IBM uses two names, Embedded Security Subsystem and ThinkVantage Technology. Winbond Corporation uses SafeKeeper. Phoenix Technologies' BIOS for it is called Core Managed Environment (cME). Fujitsu calls it FirstWare Vault. Hewlett Packard calls it ProtectTools.
Microsoft's initiative is called Next Generation Secure Computing Base (formerly Palladium). Owing to significant difficulties in creating a working implementation that third-party developers were interested in using, NGSCB is not being included with Microsoft's next major operating system release, Windows Vista. Instead, Vista will ship with a few technologies that can make use of a TPM chip, such as BitLocker Drive Encryption, and a new version of the Microsoft Cryptography API. [3]

Related projects
The group has faced widescale opposition from the free software community on the grounds that the technology they are developing has a negative impact on the users' privacy and can create customer lock-in, especially if it is used to create DRM applications. It has received criticism from the GNU/Linux and FreeBSD communities, as well as the software development community in general. Significant backlash amongst the Trusted Computing Group was present during Richard Stallman's speech at the Hackers on Planet Earth conference in July 2006, in New York. Richard Stallman and the Free Software Foundation have also criticized the group publicly in other speeches. The criticism calls Trusted Computing "Treacherous Computing" instead and warns that vendors can lock out software that is not officially signed by specific vendors, rendering it unusable.

Criticisms

AMD
Hewlett-Packard
IBM
Infineon
Intel Corporation
Lenovo Holdings Limited
Microsoft
Sun Microsystems, Inc.