Microsoft is taking another major step toward improving Windows security by introducing TPM-based attestation to strengthen its activation system. The move primarily targets unauthorized use of Key Management Service (KMS) activation, making it significantly more difficult for fake activation servers to impersonate legitimate Microsoft infrastructure.
The new security measure builds upon Microsoft’s long-standing push toward hardware-backed security, which first gained widespread attention with Windows 11’s TPM requirement.
Closing Long-Standing KMS Loopholes
KMS was originally designed for businesses and organizations that need to activate large numbers of Windows devices without requiring every machine to connect directly to Microsoft’s servers.
However, the system has long been exploited by unauthorized activation tools that emulate KMS servers, allowing Windows installations to appear legitimately activated without valid licenses.
TPM-Based Attestation Adds Hardware Verification
To address this issue, Microsoft is introducing TPM-based attestation on KMS servers.
Using the Trusted Platform Module (TPM), legitimate KMS servers will generate cryptographic proof that verifies both their identity and system integrity before they are allowed to provide activation services.
This hardware-backed verification is designed to prevent software-based emulated KMS servers from impersonating authorized activation servers.
Rolling Out with Windows Server 2025
Microsoft will begin notifying system administrators about the upcoming changes starting in August 2026 for Windows Server 2025, giving organizations time to verify their hardware compatibility and prepare for the transition.
The company intends for TPM-backed verification to become a standard requirement for future Windows Server deployments.
Impact on Unauthorized Activation Tools
The new system is expected to make life considerably harder for projects that rely on online KMS emulation, as servers lacking genuine TPM-backed authentication will no longer be able to pass Microsoft’s verification process.
According to the report, some developers behind unofficial activation tools have already begun experimenting with alternative techniques, including a method known as TSforge, which they claim may bypass the new protection.
While Microsoft’s latest security enhancements currently focus on enterprise environments, they represent another step toward expanding hardware-based protection across the Windows ecosystem.
Source: Techspot
