← Back to Microsoft Windows Server 2025 Security Technical Implementation Guide

V-278230

CAT II (Medium)

Windows Server 2025 must be configured to use FIPS-compliant algorithms for encryption, hashing, and signing.

Rule ID

SV-278230r1181396_rule

STIG

Microsoft Windows Server 2025 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-002450

Discussion

This setting ensures the system uses FIPS-compliant algorithms for encryption, hashing, and signing. FIPS-compliant algorithms meet specific standards established by the U.S. Government and must be the algorithms used for all OS encryption functions.

Check Content

If the following registry value does not exist or is not configured as specified, this is a finding:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\FIPSAlgorithmPolicy\

Value Name: Enabled

Value Type: REG_DWORD
Value: 0x00000001 (1)
 
Clients with this setting enabled will not be able to communicate via digitally encrypted or signed protocols with servers that do not support these algorithms. Both the browser and web server must be configured to use TLS; otherwise, the browser will not be able to connect to a secure site.

Fix Text

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> System cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing to "Enabled".