4 Chapter 4. Planning for the Encryption Facility for z/OS This chapter describes and discusses the capabilities of encryption facilities available on System z hardware and software and shows how these can be used with the Encryption Facility. In this chapter, we provide: Some reminders about the IBM Common Cryptographic Architecture (CCA) and its implementation in z/OS More detailed explanations about how the Encryption Facility for z/OS operates and its encryption options Information about the combinations of valid encryption and decryption methods An explanation about how to exploit RSA keys for use with the Encryption Facility for z/OS © Copyright IBM Corp. 2007. All rights reserved. 39