Configure hash algorithms for certificate logon
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Windows 11 Version 22H2
Path in the GPO console
Computer Configuration\Administrative Templates\System\Kerberos Description
This policy setting controls hash or checksum algorithms used by the Kerberos client when performing certificate authentication. If you enable this policy, you will be able to configure one of four states for each algorithm: - “Default” sets the algorithm to the recommended state. - “Supported” enables usage of the algorithm. Enabling algorithms that have been disabled by default may reduce your security. - “Audited” enables usage of the algorithm and reports an event (ID 206) every time it is used. This state is intended to verify that the algorithm is not being used and can be safely disabled. - “Not Supported” disables usage of the algorithm. This state is intended for algorithms that are deemed to be insecure. If you disable or do not configure this policy, each algorithm will assume the “Default” state. More information about the hash and checksum algorithms supported by the Windows Kerberos client and their default states can be found at https://go.microsoft.com/fwlink/?linkid=2169037. Events generated by this configuration: 205, 206, 207, 208.
Registry
HKLM
Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters Value name: PKInitHashAlgorithmConfigurationEnabled
Enabled: PKInitHashAlgorithmConfigurationEnabled = 1
Disabled: PKInitHashAlgorithmConfigurationEnabled = 0
MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/Kerberos/PKInitHashAlgorithmConfiguration Multiple CSP matches are possible; the first one was selected.
Microsoft Learn documentation Mapping data: Microsoft Learn (CC BY 4.0)
CSP values
-
0 (Default)- Disabled / Not Configured. -
1- Enabled.
Export Builder
BETAConfigure the state, scope and options, then generate .reg, PowerShell, Intune and SCCM outputs — or add the setting to a multi-setting collection.
These exports write the registry — this is not a managed GPO. ⓘ
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Configure hash algorithms for certificate logon
; State: Enabled
; Supported on: At least Windows 11 Version 22H2
[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters]
"PKInitHashAlgorithmConfigurationEnabled"=dword:00000001
"PKInitSHA1"=dword:00000001
"PKInitSHA256"=dword:00000001
"PKInitSHA384"=dword:00000001
"PKInitSHA512"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Configure hash algorithms for certificate logon
# State: Enabled
# Supported on: At least Windows 11 Version 22H2
$path = 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'PKInitHashAlgorithmConfigurationEnabled' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA1' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA256' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA384' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA512' -Value 1 -Type DWordIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/Kerberos/PKInitHashAlgorithmConfiguration
Data type: String
Value:
<enabled/>
<data id="PKInitHashAlgorithmSHA1" value="1"/>
<data id="PKInitHashAlgorithmSHA256" value="1"/>
<data id="PKInitHashAlgorithmSHA384" value="1"/>
<data id="PKInitHashAlgorithmSHA512" value="1"/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Configure hash algorithms for certificate logon
# State: Enabled
# Supported on: At least Windows 11 Version 22H2
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters' -Name 'PKInitHashAlgorithmConfigurationEnabled' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters' -Name 'PKInitSHA1' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters' -Name 'PKInitSHA256' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters' -Name 'PKInitSHA384' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters' -Name 'PKInitSHA512' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Configure hash algorithms for certificate logon
# State: Enabled
# Supported on: At least Windows 11 Version 22H2
$path = 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'PKInitHashAlgorithmConfigurationEnabled' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA1' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA256' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA384' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA512' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Configure hash algorithms for certificate logon
# State: Enabled
# Supported on: At least Windows 11 Version 22H2
# SCCM Configuration Item guidance:
# Create a Configuration Item of type "Setting: Script".
# Discovery script: use the Detection script below.
# Remediation script: use the Remediation script below.
# Compliance rule: the Discovery script output equals 'Compliant'.
# === Detection script ===
# Exported from gporais.com
# Policy: Configure hash algorithms for certificate logon
# State: Enabled
# Supported on: At least Windows 11 Version 22H2
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters' -Name 'PKInitHashAlgorithmConfigurationEnabled' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters' -Name 'PKInitSHA1' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters' -Name 'PKInitSHA256' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters' -Name 'PKInitSHA384' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters' -Name 'PKInitSHA512' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Configure hash algorithms for certificate logon
# State: Enabled
# Supported on: At least Windows 11 Version 22H2
$path = 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'PKInitHashAlgorithmConfigurationEnabled' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA1' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA256' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA384' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'PKInitSHA512' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.