The minimum pin length for Windows Hello for Business must be six characters or greater.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-63721	WN10-CC-000260	SV-78211r2_rule		Medium

Description
Windows Hello for Business allows the use of PINs as well as biometrics for authentication without sending a password to a network or website where it could be compromised. Longer minimum PIN lengths increase the available combinations an attacker would have to attempt. Shorter minimum length significantly reduces the strength.

STIG	Date
Windows 10 Security Technical Implementation Guide	2016-11-03

Details

Check Text ( C-64469r1_chk )
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: \SOFTWARE\Policies\Microsoft\PassportForWork\PINComplexity\ Value Name: MinimumPINLength Type: REG_DWORD Value: 6 (or greater)

Fix Text (F-69649r2_fix)
Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Hello for Business >> PIN Complexity >> "Minimum PIN length" to "6" or greater.