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Status Future consideration
Workspace IBM Z and LinuxONE Systems Hardware
Categories Crypto HW
Created by Guest
Created on Feb 2, 2017

RELATED IDEAS

Support for Diffie-Hellman in the crypto coprocessor cards (CEXnC)

We call in our CICS applications external webservices and external http requests, which are hosted at external Partners, means there is a http conversation between CICS and an external Partner, in which CICS has the role Client. For security reason there is the requirement to encrypt This communication via SSL/TLS. For this Task there are different cipher suites available with different key lengths and different encryption processes. We realized, that it consumes a lot of CPU if we use ciphers suites which include Diffie-Hellmann, e.g. TLS_DHE_RSA_WITH_AES_256_CBC_SHA, because a lot of the calculations are execucuted in SW, means on the usual GP CPUs. Other suites are completely calculated in crypto Hardware, but the modern cipher suites mainly use DH. We reduced the cipher suites to the following list 0A2F35 to avoid the CPU Overhead, but this is only a short term solution (TLS_RSA_WITH_AES_256_CBC_SHA is actually used). The middle-term solution should be to offer more stronger and modern cipher suites, without any Overhead in the CPU. consumption.

Idea priority High
  • Guest
    Reply
    |     Aug 24, 2020

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - z Systems Hardware
    Product - z Systems Hardware
    Component - Crypto HW

    For recording keeping, the previous attributes were:
    Brand - Servers and Systems Software
    Product family - z Systems Hardware
    Product - z Systems Hardware
    Component - Security / Crypto

  • Guest
    Reply
    |     Mar 24, 2017

    This requirement is being considered by the crypto team.

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