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Michiko Short 2017-08-31 17:09:43 -07:00
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windows/access-protection/credential-guard/credential-guard-considerations.md
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@ -58,9 +58,9 @@ As a result Credential Guard can no longer decrypt protected data. VBS creates a
Since Credential Manager cannot decrypt saved Windows Credentials, they are deleted. Applications should prompt for credentials that were previously saved. If saved again, then Windows credentials are protected Credential Guard. Since Credential Manager cannot decrypt saved Windows Credentials, they are deleted. Applications should prompt for credentials that were previously saved. If saved again, then Windows credentials are protected Credential Guard.
### Domain-joined device’s automatically provisioned public key ### Domain-joined device’s automatically provisioned public key
Beginning with Windows 10 and Windows Server 2016, domain-devices automatically provision a bound public key, for more information about automatic public key provisioning, see [Domain-joined Device Public Key Authentication](https://mva.microsoft.com/en-us/training-courses/deep-dive-into-credential-guard-16651?l=1CoELLJyC_6704300474). Beginning with Windows 10 and Windows Server 2016, domain-devices automatically provision a bound public key, for more information about automatic public key provisioning, see [Domain-joined Device Public Key Authentication](https://docs.microsoft.com/windows-server/security/kerberos/domain-joined-device-public-key-authentication).
Since Credential Guard cannot decrypt the protected private key, Windows uses the domain-joined computer's password for authentication to the domain. Unless additional policies are deployed, there should not be a loss of functionality. If a device is configured to only use public key, then it cannot authenticate with password until that policy disabled. For more information on Configuring device to only use public key, see [Domain-joined Device Public Key Authentication](https://mva.microsoft.com/en-us/training-courses/deep-dive-into-credential-guard-16651?l=1CoELLJyC_6704300474). Since Credential Guard cannot decrypt the protected private key, Windows uses the domain-joined computer's password for authentication to the domain. Unless additional policies are deployed, there should not be a loss of functionality. If a device is configured to only use public key, then it cannot authenticate with password until that policy disabled. For more information on Configuring device to only use public key, see [Domain-joined Device Public Key Authentication](https://docs.microsoft.com/windows-server/security/kerberos/domain-joined-device-public-key-authentication).
Also if any access control checks including authentication policies require devices to have either the KEY TRUST IDENTITY (S-1-18-4) or FRESH PUBLIC KEY IDENTITY (S-1-18-3) well-known SIDs, then those access checks fail. For more information about authentication policies, see [Authentication Policies and Authentication Policy Silos](https://docs.microsoft.com/en-us/windows-server/security/credentials-protection-and-management/authentication-policies-and-authentication-policy-silos). For more information about well-known SIDs, see [[MS-DTYP] Section 2.4.2.4 Well-known SID Structures](https://msdn.microsoft.com/en-us/library/cc980032.aspx). Also if any access control checks including authentication policies require devices to have either the KEY TRUST IDENTITY (S-1-18-4) or FRESH PUBLIC KEY IDENTITY (S-1-18-3) well-known SIDs, then those access checks fail. For more information about authentication policies, see [Authentication Policies and Authentication Policy Silos](https://docs.microsoft.com/en-us/windows-server/security/credentials-protection-and-management/authentication-policies-and-authentication-policy-silos). For more information about well-known SIDs, see [[MS-DTYP] Section 2.4.2.4 Well-known SID Structures](https://msdn.microsoft.com/en-us/library/cc980032.aspx).