authenticator.setCTime( now );
authenticator.setCusec( clientMicroSeconds );
authenticator.setSubKey( subSessionKey );
authenticator.setSeqNumber( sequenceNumber );
Checksum checksum = getBodyChecksum( requestBody, checksumType );
authenticator.setCksum( checksum );
EncryptedData encryptedAuthenticator = lockBox.seal( sessionKey, authenticator, KeyUsage.TGS_REQ_PA_TGS_REQ_PADATA_AP_REQ_TGS_SESS_KEY );
return encryptedAuthenticator;