PSA API Specifications

This website hosts the PSA API documents that are published by Arm.

PSA API development is now governed by GlobalPlatform. Specification source files, updates, and discussions, as well as reference headers and example code, can be found in the GlobalPlatform PSA API GitHub project.

Test suites to verify a correct implementation can be found in the PSA API Test suites.

Specifications

The following specifications are part of the PSA APIs:

Specification
Crypto API	1.5	HTML	↓ PDF	All versions
Secure Storage API	1.0	HTML	↓ PDF	All versions
Attestation API	2.0	HTML	↓ PDF	All versions
Firmware Update API	1.0	HTML	↓ PDF	All versions
Status code API	1.0	HTML	↓ PDF	All versions

Extensions

Extension specifications introduce new functionality that is not yet stable enough for inclusion in the main specification.

Specification	Extension
Crypto API	PAKE	1.2 Final			Superseded
Crypto API	PQC	1.4 Final			Superseded

Since Crypto API 1.3, the PAKE Extension is integrated into the Crypto API specification. Since Crypto API 1.5, the PQC Extension is integrated into the Crypto API specification. Older versions of these extensions can be found on the Crypto API page.

In development

These specifications are being developed towards an initial 1.0 version:

Specification
Crypto Driver Interface	1.0 Alpha 1	HTML	↓ PDF	All versions

Feedback

If you have questions or comments on any of the specifications, or suggestions for enhancements, please raise a new issue in the PSA API GitHub project.

Please indicate which specification the issue applies to. This can be done by:

Providing a link to the section of the specification on this website.
Providing the document name, full version, and section or page number in the PDF.

License

The latest versions of the PSA APIs that are hosted on this website are licensed under the Creative Commons Attribution–Share Alike 4.0 International license and Apache License, Version 2.0. Some earlier versions of the specifications are licensed under a non-confidential license from Arm.

Refer to individual documents for license details.