Policy

Configure legacy RSA public key size

This policy setting allows you to configure whether Office displays a digital signature as legacy because of the number of RSA public key bits used in the digital signature. If you enable this policy setting, you can specify the number of bits that Office treats as legacy in a digital signature. For example: 512, 768, etc. If you don’t configure this policy setting, Office won’t treat any digital signatures as legacy because of the number of bits in the public key. Enabling this policy causes the minimum RSA public key size to be the next largest option.

Policy
Pack Microsoft Office
Category Microsoft Office 2016 / Security Settings / Digital Signatures
Policy ID 417f7a962e56
Internal name L_SelectDigitalSignatureLegacyRSABits

Registry

Copy registry mappings

HKCU\software\policies\microsoft\office\16.0\common\signatures\legacyrsabits

Policy notes

This policy setting allows you to configure whether Office displays a digital signature as legacy because of the number of RSA public key bits used in the digital signature. If you enable this policy setting, you can specify the number of bits that Office treats as legacy in a digital signature. For example: 512, 768, etc. If you don’t configure this policy setting, Office won’t treat any digital signatures as legacy because of the number of bits in the public key. Enabling this policy causes the minimum RSA public key size to be the next largest option.

Related policies

Check the XAdES portions of a digital signatureConfigure invalid DSA public key sizeConfigure invalid hashing algorithmConfigure invalid RSA public key sizeConfigure legacy DSA public key sizeConfigure legacy hashing algorithmConfigure minimum DSA public key size