More and more data is being transmitted across networks where, for various reasons, the keys used on one network cannot be used on another network. Encrypted data and PINs that are transmitted across these boundaries must be "translated" securely from encryption under one key to encryption under another key. For example, a traveler visiting a foreign city might wish to use an ATM to access an account at home. The PIN entered at the ATM might need to be encrypted at the ATM and sent over one or more financial networks to the traveler’s home bank. At the home bank, the PIN must be verified prior to access being allowed. On intermediate systems (between networks), applications can use the Encrypted PIN translate callable service to re-encrypt a PIN block from one key to another. Running on ICSF, such applications can ensure that PINs never appear in the clear and that the PIN-encrypting keys are isolated on their own networks.