ECC Curve Order: registry value EccCurvesComputerHKLM\SOFTWARE\Policies\Microsoft\Cryptography\Configuration\SSL\00010002

Policy ID: SSLCurveOrder
Scope: Computer Configuration
Supported on: At least Windows Server 2016, Windows 10
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Network › SSL Configuration Settings

Registry

EccCurves

REG_MULTI_SZComputer

HKLM\SOFTWARE\Policies\Microsoft\Cryptography\Configuration\SSL\00010002 Current key

Enabled value: Depends on the option value
Element: ECC Curve Order:
Value type: REG_MULTI_SZ

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Cryptography\Configuration\SSL\00010002]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
; hex(2) and hex(7) data must be written as hexadecimal (UTF-16LE)
"EccCurves"=hex(7):<enter value>

CMD

:: Value names and types follow the ADMX. Replace <enter value> below with your own data

reg add "HKLM\SOFTWARE\Policies\Microsoft\Cryptography\Configuration\SSL\00010002" /v "EccCurves" /t REG_MULTI_SZ /d "<enter value>" /f

PowerShell

# Value names and types follow the ADMX. Replace <enter value> below with your own data

New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Cryptography\Configuration\SSL\00010002' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Cryptography\Configuration\SSL\00010002' -Name 'EccCurves' -PropertyType MultiString -Value '<enter value>' -Force | Out-Null