# OP-TEE/optee_os

Trusted side of the TEE

Repository: https://github.com/OP-TEE/optee_os
Canonical: https://ross.abutalabs.com/products/optee_os
Language: C
License: NOASSERTION
License Family: other
Last push: 2026-08-25T11:51:10+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 4482, "days_push": 8, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1927, forks 1257 (observed 2026-08-28T04:05:55.711086+00:00)

## What it is
OP-TEE Trusted OS is the secure-world operating system implementation of the OP-TEE project, running on ARM TrustZone-enabled hardware. It implements a GlobalPlatform-compliant Trusted Execution Environment that isolates trusted applications from the normal (rich) OS.

## Use cases
- run trusted applications isolated from the main OS
- implement a GlobalPlatform-compliant TEE on ARM hardware
- store cryptographic keys in a secure enclave
- build secure boot and DRM solutions with TrustZone
- develop secure-world firmware in C

## When to choose
- you need hardware-isolated security on ARM TrustZone-capable SoCs
- you want an open-source GlobalPlatform TEE implementation
- you're building secure key storage, attestation, or DRM on embedded Linux devices

## When to avoid
- your hardware lacks ARM TrustZone support
- you need a general-purpose OS rather than a secure-world environment
- you only need software-level encryption without hardware isolation

## Facets
- artifact type: library
- maturity: active
- function: security, cryptography, embedded
- domain: security, embedded-systems, operating-systems
- platform: embedded, c
- tags: tee, trusted-execution-environment, arm-trustzone, secure-world, optee, globalplatform, arm, linux

## Member repositories
- OP-TEE/optee_os (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:55.711086+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:09:08.766844+00:00, confidence not recorded.
  - readme: https://github.com/OP-TEE/optee_os (fetched 2026-08-28T04:05:55.711086+00:00, sha e19136105105)
- Data as of 2026-08-30T08:39:29.467469+00:00.