IBM Z10 BC manual Support for ISO, Support for RSA keys up to 4096 bits, Secure Key AES

Improved key exchange – Added Improved key exchange with non-CCA cryptographic systems. New fea- tures added to IBM Common Cryptographic Architecture (CCA) are designed to enhance the ability to exchange keys between CCA systems, and systems that do not use control vectors by allowing the CCA system owner to defi ne permitted types of key import and export while preventing uncontrolled key exchange that can open the system to an increased threat of attack.

These are supported by z/OS and by z/VM for guest exploitation.

Support for ISO 16609

Support for ISO 16609 CBC Mode T-DES Message Authentication (MAC) requirements ISO 16609 CBC Mode T-DES MAC is accessible through ICSF function calls made in the PCI-X Cryptographic Adapter segment 3 Common Cryptographic Architecture (CCA) code.

This is supported by z/OS and by z/VM for guest exploita- tion.

Support for RSA keys up to 4096 bits

The RSA services in the CCA API are extended to sup- port RSA keys with modulus lengths up to 4096 bits. The services affected include key generation, RSA-based key management, digital signatures, and other functions related to these.

Refer to the ICSF Application Programmers Guide, SA22- 7522, for additional details.

Cryptographic enhancements to Crypto Express2 and

Crypto Express2-1P

Dynamically add crypto to a logical partition.

Today, users can preplan the addition of Crypto Express2 features to a logical partition (LP) by using the Crypto page in the image profi le to defi ne the Cryptographic Candidate List, Cryptographic Online List, and Usage and Control Domain Indexes in advance of crypto hardware installation.

With the change to dynamically add crypto to a logical partition, changes to image profi les, to support Crypto Express2 features, are available without outage to the logical partition. Users can also dynamically delete or move Crypto Express2 features. Preplanning is no longer required.

This enhancement is supported by z/OS, z/VM for guest exploitation, z/VSE, and Linux on System z.

Secure Key AES

The Advanced Encryption Standard (AES) is a National Institute of Standards and Technology specifi cation for the encryption of electronic data. It is expected to become the accepted means of encrypting digital information, includ- ing fi nancial, telecommunications, and government data.

AES is the symmetric algorithm of choice, instead of Data Encryption Standard (DES) or Triple-DES, for the encryp- tion and decryption of data. The AES encryption algorithm will be supported with secure (encrypted) keys of 128, 192, and 256 bits. The secure key approach, similar to what is supported today for DES and TDES, provides the ability to keep the encryption keys protected at all times, including the ability to import and export AES keys, using RSA public key technology.

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