Configuring the Certificate Policies Extension

Figure 95 Communications Preferences

About the Policy Constraints Extension

The certificate policies extension can be used in conjunction with the policy constraint extension. This extension is configured by your CA and requires no setup in EncrypTight components. It places additional controls on how certificates can be used. The policy constraints extension can:

Prohibit policy mapping

Policy mapping is the practice by which one OID is considered equivalent to a different OID. When policy mapping is prohibited, a value in the extension indicates the number of additional certificates in the chain that can be checked before policy mapping is prohibited. Beyond that point, policy mapping is not allowed and authentication can fail.

Require that every certificate in the certificate chain include acceptable policy identifiers, as specified in the certificate policies extension

With this option, a value in the extension indicates the number of additional certificates in the chain that can be checked before all certificates in the chain must include acceptable policy identifiers, either an exact match to an OID configured in the device or an OID considered equivalent through policy mapping. If the next certificate in the chain does not include acceptable OIDs, authentication can fail.

Your CAs can provide information about their practice for using these extensions.

Related topics:

“Working with Certificates for EncrypTight and the ETKMSs” on page 272

“Working with Certificates and an HSM” on page 275

“Working with Certificates for the ETEPs” on page 277

“Enabling and Disabling Strict Authentication” on page 292

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Black Box ET1000A, ET0010A, ET0100A manual EncrypTight User Guide 271

EncrypTight, ET0100A, ET0010A, ET1000A specifications

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