Much of the data held by the Host is encrypted under specific LMK pairs. If the value of a pair changes, the associated data cannot be used until it has been translated. To do this a facility is provided for the storage of the old LMK pair within the HSM. This storage location is known as “Key Change Storage”.
When the old pair has been saved in key change storage, and the new pair loaded in the standard LMK storage, all data held on the Host, encrypted under the old LMK pair must be sent to the HSM for translation. Commands are provided for translating each type of key, PINs and decimalisation tables encrypted for Host storage.