This part of ISO 11568 specifies techniques for the protection of symmetric and asymmetric cryptographic keys in a retail financial services environment using asymmetric cryptosystems and the life cycle management of the associated asymmetric keys. The techniques described in this part of ISO 11568 enable compliance with the principles described in ISO 11568-1. For the purposes of this document, the retail financial services environment is restricted to the interface between: -- a card-accepting device and an acquirer; -- an acquirer and a card issuer; -- an ICC and a card-accepting device.