22.214.171.124 Key Version Numbers
The Kerberos V5 protocol specifies key version numbers ([RFC4120] section 5.2.9). Key version numbers are used in the Kerberos V5 protocol to distinguish between different keys in the same domain. KILE key version numbers (as defined in [RFC4120] section 5.2.9) are signed 32-bit integers.
KILE supports key version numbers for read-only domain controllers (RODCs). Each RODC will have a different key version number.<27> This allows the domain controller to distinguish between keys that are issued to different RODCs.
The key version number consists of 32 bits. The first 16 bits, including the most significant bit, are an unsigned 16-bit number which SHOULD identify the RODC. The remaining 16 bits SHOULD be the version number of the key.