IBM 4767 Crypto Card

Available as IBM Z® feature CEX5S, IBM Power Systems™ features EJ32 and EJ33, and x64 MTM 4767-002

4767 overview

An IBM PCIe Cryptographic Coprocessor is a high-performance hardware security module (HSM) suitable for high-security processing and high-speed cryptographic operations. The IBM 4767 Cryptographic Coprocessor is a hardware security module (HSM) that is designed for high performance and security rich services for your sensitive workloads, and to deliver high throughput for cryptographic functions. Its predecessor is the IBM 4765. More recent IBM HSMs include the IBM 4769 and IBM 4768.
For a detailed summary of the capabilities and specifications of the IBM 4767 (formerly known as the IBM PCIeCC2), refer to the IBM 4767 Data Sheet (PDF, 326 KB).

IBM 4767 hardware security module

Highest cryptographic security available.

Federal Information Processing Standards (FIPS) are issued by the U.S. National Institute of Standards and Technology (NIST). The IBM 4767's cryptographic processes are performed within an enclosure on the HSM that is validated to FIPS PUB 140-2, Security Requirements for Cryptographic Modules, Overall Security Level 4. See FIPS certification number 3164 (link resides outside of on the Computer Security Resource Center website for the certification. Level 4 is the highest level of certification achievable for commercial cryptographic devices. See FIPS status on the IBM 4767 FAQ page for additional information.

Certificate No. 3164 
TM: A Certification Mark of NIST, which 
does not imply product endorsement by 
NIST, the U.S. or Canadian 

FIPS 140-2 Level 4 certificate #3164

Available on multiple platforms.

IBM Power Systems™

x64 servers

For additional information, visit IBM Marketplace

IBM Z mainframe

The IBM 4767 is available as feature code (FC) 0890 (Crypto Express5S, or CEX5S) on IBM Z mainframes (z14®, z13s™, and z13® only), either on z/OS® or Linux® on z Systems® operating systems.

  • FC 0890 requires FC 3863 - CPACF (Central Processor Assist for Cryptographic Functions) DES/TDES Enablement. CPACF is a set of cryptographic instructions providing improved performance through hardware acceleration. Using the cryptographic hardware, you gain security from using the CPACF and the Crypto feature through in-kernel cryptography APIs, and for Linux on IBM Z the libica cryptographic functions library.

  • On z/OS, IBM offers the Integrated Cryptographic Service Facility (ICSF) component that ships with the base product. ICSF is the software on z/OS that provides access to the IBM Z CEX5S cryptographic hardware feature through the use of callable services that comply with IBM's Common Cryptographic Architecture (CCA). ICSF together with the IBM Resource Access Control Facility (RACF®) licensed program provide cryptographic services using the CCA security API.

  • On Linux on Z, IBM offers a CCA API for the CEX5S and an IBM Enterprise PKCS #11 (EP11) API to the user. The CCA API shipped with the CEX5S is an enhanced version of the CCA API shipped with the CEX4S or CEX3.

IBM Power Systems

The IBM 4767 is available as FC EJ32, Customer Card Identification Number 4767 (without blind-swap cassette custom carrier) and as FC EJ33, Customer Card Identification Number 4767 (with blind-swap cassette custom carrier) on IBM POWER8® servers, either on IBM AIX®, IBM i®, or PowerLinux® (Red Hat® Enterprise Linux (RHEL), SUSE® (a MicroFocus company) Linux Enterprise Server, or Ubuntu®) operating systems.

x64 servers

The IBM 4767 is available as a machine type-model 4767-002 on x64 servers on either Microsoft® Windows® Server, SLES, or RHEL 64-bit operating systems. IBM offers a Common Cryptographic Architecture (CCA) Support Program for the IBM 4767 PCIe Cryptographic Coprocessor, at no charge, to the user. CCA for the 4767 is an enhanced version of the CCA Support Program shipped with the IBM 4765 PCIe Cryptographic Coprocessor.

IBM 4767 hardware

The IBM 4767 hardware provides significant performance and architectural extensions over its predecessor while enabling future growth. The secure module contains redundant IBM PowerPC 476 processors, custom symmetric key and hashing engines to perform AES, DES, T-DES, SHA-1, SHA-384, SHA-512, and SHA- 2, MD5 and HMAC as well as public key cryptographic algorithm support for RSA and Elliptic Curve Cryptography. Other hardware support includes a secure real-time clock, hardware random number generator and a prime number generator. The secure module is protected by a tamper responding design that protects against a wide variety of attacks against the system.


Diagram of hardware design for IBM 4767 HSM

Reliability, Availability, and Serviceability (RAS)

Hardware has also been designed to support the highest level of RAS requirements that enables the secure module to self-check at all times. This is achieved by running a pair of PowerPC processors in lock step and comparing the result from each cycle by cycle. Also all interfaces, registers, memory, cryptographic engines, and buses are protected at all times using parity, ECC, or CRC. Power on self-tests that are securely stored inside the secure module verify the hardware and firmware loaded on the module is secure and reliable at every power on.


Embedded certificate

During the final manufacturing step, the coprocessor generates a unique public/private key pair which is stored in the device. The tamper detection circuitry is activated at this time and remains active throughout the useful life of the coprocessor, protecting this private key as well as other keys and sensitive data. The public key of the coprocessor is certified at the factory by an IBM private key and the certificate is retained in the coprocessor. Subsequently, the private key of the coprocessor is used to sign the coprocessor status responses which, in conjunction with a series of public key certificates, demonstrate that the coprocessor remains intact and is genuine.

Tamper responding design

The IBM 4767 HSM has been designed to meet the FIPS 140-2 Level 4 requirements by protecting against attacks that include probe penetration or other intrusion into the secure module, side-channel attacks, power manipulation, and temperature manipulation. From the time of manufacture, the hardware is self-protecting by using tamper sensors to detect probing or drilling attempts. If the tamper sensors are triggered, the 4767 HSM destroys critical keys and certificates, and is rendered permanently inoperable. Note therefore that the 4767 HSM must be maintained at all times within the temperature, humidity, and barometric pressure ranges specified. Refer to the environmental requirements section below.

Diagram showing PCIe card, tamper responding membrane, secure enclosure, and circuitry

IBM 4767 Technical specifications

Physical characteristics

Card type:

Half-length PCIe card 
PCI Local Bus Specification 2.2 
PCIe specification 1.1 
+3.3 VDC ± 10% 23.44 W max


System requirements

This section describes requirements for the system in which the IBM 4767 is installed.

Software Hardware

IBM CCA Support Program for use on:

  • Red Hat Enterprise Linux 6.7 (64-bit)
  • SUSE Linux 12 Service Pack 1 (64-bit)
  • Microsoft Windows Server 2012, R2 (64-bit)
The coprocessor can be installed in an x64 server that has at least one PCIe slot
capable of accepting a standard height, half-length PCIe card and that meets the
power and environmental requirements specified below.


Environmental requirements

From the time of manufacture, the IBM 4767 cryptographic card must be shipped, stored, and used within the following environmental specifications. Outside of these specifications, the IBM 4767 tamper sensors can be activated and render the IBM 4767 permanently inoperable. Using a 4767 in a server that does not meet these requirements voids the warranty.


Shipping: The card should be shipped in original IBM packaging (electrostatic discharge bag with desiccant and thermally insulated box with gel packs).

Temp shipping

Pressure shipping

Humidity shipping

-34°C to +60°C

min 550 mbar 5% to 100% RH


Storage: The card should be stored in electrostatic discharge bag with desiccant.

Temp storage Pressure storage Humidity storage
+1°C to +60°C min 700 mbar 5% to 80% RH


Operation: (ambient in system)

Temp operating Humidity operating Operating altitude (max)
+10°C to +35°C 8% to 80% RH 10 000 ft equivalent to 700 mbar min



A pair of batteries mounted on the coprocessor board provides backup power when the 4767 HSM is not in a powered-on machine. These batteries must only be removed according to the documented battery replacement procedure to avoid zeroizing the coprocessor and rendering it permanently inoperable. A battery replacement kit can be obtained from IBM. See the How to order page for details.