Kerberos encryption types must be configured to prevent the use of DES encryption suites.

From Windows 8 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

SV-48426r1_rule Kerberos encryption types must be configured to prevent the use of DES encryption suites.

Vulnerability discussion

Certain encryption types are no longer considered secure. This setting configures a minimum encryption type for Kerberos, preventing the use of the DES encryption suites.

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Fix text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Network Security: Configure encryption types allowed for Kerberos" to "Enabled" with only the following selected: RC4_HMAC_MD5 AES128_HMAC_SHA1 AES256_HMAC_SHA1 Future encryption types

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