Teaclave was originally created with a broad vision to explore the possibilities of confidential computing. It consisted of multiple components, including SDKs supporting Intel SGX and Arm TrustZone, a general-purpose application framework (FaaS), and experimental verification efforts, spanning several repositories under the Apache Incubator.

Over the years, as the field of confidential computing evolved, we observed a clear trend: developers increasingly preferred building their own Trusted Applications using SDKs directly, rather than relying on a general-purpose FaaS framework. This organic shift in usage has also been reflected in our contributor activities. Most community engagement and active development now center around the SDKs, especially the Rust-based TrustZone and SGX SDKs.

As part of our preparation for graduation from the Apache Incubator, we’ve received recurring questions about what Teaclave is today, and what its long-term focus should be. To address this and align with current usage and contributions, we propose a refined mission and corresponding repository restructuring.

Refined Mission​

Teaclave empowers developers to build memory-safe (e.g. Rust) Trusted Applications across diverse confidential computing platforms.
Our primary focus going forward will be on maintaining and improving SDKs that support this mission.

Repository Restructuring Plan​

Goals​

• Reflect Teaclave’s active development and current focus
• Reduce long-term maintenance costs for inactive components
• Preserve historical contributions and community merit

incubator-teaclave​

Current Status:

• Role: Former flagship repository for the FaaS-style confidential computing framework.
• Activity: Last commit in July 2023.
• Maintenance: No longer actively developed or aligned with the community’s current direction.

Shift in Focus:

• This repository will be repurposed as the main landing page for the Teaclave project (Podling or TLP). It will provide high-level documentation, links to active SDKs, examples to help users get started, and showcases to build with Teaclave SDKs.
• Historical contributions and community merit will be preserved 1.
• Preview of reorganized content is already hosted on the main branch 2.
  • A clear project overview
  • Links to active SDK repositories (TrustZone, SGX, etc.)
  • Showcases for each SDK
  • A unified contribution guide and roadmap

Action Items:

• Deprecate the existing master branch and rename it to legacy
• Set main as the default branch

incubator-teaclave-crates​

Current Status:

• Role: Hosts ported/forked crates for TEE platforms (e.g., sgx-crypto, protobuf)
• Activity: Some crates are outdated or redundant
• Maintenance: Partial

Shift in Focus:
This repository will remain an auxiliary dependency hub supporting only the active SDKs. It will be cleaned and scoped down to what is still necessary for TrustZone/SGX development.
Action Items:

• Retain the repository to support SDK builds and examples
• Remove:
  • Crates no longer used by maintained SDKs or demos
  • Redundant forks of crates that now work upstream
• Preserve and maintain:
  • Crates required by incubator-teaclave-trustzone-sdk or incubator-teaclave-sgx-sdk

incubator-teaclave-verification​

Current Status:

• Role: Experimental repo for formal verification methods
• Activity: No active development or adoption
• Maintenance: Unmaintained

Shift in Focus:
This repository will become a historical archive for early verification efforts, preserved for transparency and reference.

Action Items:

• Archive the repository on GitHub (read-only)
• Add a short README noting its archival status and rationale

Active SDKs​

These SDKs are actively maintained and form the core of Teaclave’s current focus:

• incubator-teaclave-trustzone-sdk
• incubator-teaclave-sgx-sdk
• incubator-teaclave-java-tee-sdk

No changes are proposed at this time. Any future updates will be discussed in separate threads.

Agenda​

Propose He as Committer​

Teaclave FaaS​

• upgrading Teacalve SGX SDK 2.0 PR
  • disable macos/ios CI
  • protected fs in teaclavs SGX sdk is not compatible with intel sgx sdk
  • TODO: support macos/ios target for protected fs in Teaclave SGX SDK
  • third-party crates
    • new repo to host forked crates: incubator-teaclave-crates
    • no need to vendor third-party crates, having a Cargo.lock to lock the third-party
    • update readme to explain the supply chain issue
  • need review

Java TEE SDK​

• S2 (March 2023): integrate with Teaclave SGX SDK 2.0
• Release PR

Discussion​

https://r3conclave.github.io/ccl-documentation/

Attendees​

• He Sun
• Hongbo chen
• Kailun Qin
• Mingshen Sun
• Qinkun Bao
• Ran Duan
• Sanhong Li
• Shaojun Wang
• Yingchun Gao
• Yu Lei
• Ziyi Lin

Agenda​

Introduction​

Teaclave FaaS​

• Upgrade to Rust SGX SDK 2.0
• Q: DockerHub image (Mingshen: add He as owner)
• MS: apache DockerHub infra for Teaclave
• Protected FS in 2.0 for macos/iOS is not supported (Ran)
• Replace RPC as tonic based on RA-TLS (Yingchun: create a github issue)
• RA-TLS standard (CCC, Ali, Intel, etc)
• Function languages: Rust, WebAssembly, Python, Occlum

Teaclave SGX SDK (Rust SGX SDK)​

• Protected FS in SDK is not compatible with Intel SGX SDK
• Supports Teaclave and Occlum features
• Cache size/key policy added in Teaclave SGX SDK
• 2.0 release
  • testing
    • unit test
    • Rust std tests (800) and benchmark
    • sample code test
    • teaclave dependencies
  • document
  • CI
  • EDMM in 2.0 (Occlum will use EDMM)

Teaclave Java TEE SDK​

• 0.1 release
  • Voting
  • Checklist
• CI (self-hosted runner for GitHub Actions)
  • Apache Infra Jira ticket, Github Actions token (Mingshen: apply token)

Teaclave TrustZone SDK (Rust OP-TEE TrustZone SDK)​

• N/A

Attendees​

• He Sun
• Hongbo chen
• Kailun Qin
• Mingshen Sun
• Qinkun Bao
• Ran Duan
• Sanhong Li
• Shaojun Wang
• Yingchun Gao
• Yu Lei
• Ziyi Lin

Abstract​

Teaclave Java TEE SDK is a Java confidential computing programming framework. It follows the host-and-enclave partition programming model defined by Intel-SGX SDK. Teaclave Java TEE SDK provides an elegant way to divide a java project into host and enclave modules, where the enclave module is a provider of a user-defined service interface which is similar to the Java SPI model. Teaclave Java TEE SDK could help you to develop and build a Java confidential computing project with high efficiency.

Proposal​

Teaclave Java TEE SDK is a pure Java SDK for Java confidential computing. It eases the interactions between secured and unsecured environment with a few concise APIs. From user's aspect, creating an enclave environment and invoking confidential computing services would be as simple as invoking SPI services.

Background​

The Teaclave Java TEE SDK project is being actively developed within Alibaba Cloud.

Rationale​

Teaclave Java TEE SDK is a Java confidential computing programming framework. The goal of Teaclave is to provide a universal secure computing platform for multiple programming languages. Teaclave currently supports Rust, Python and WebAssembly, but Java is still missing. Teaclave Java TEE SDK would be an important piece of the puzzle.

Initial Goals​

• Transfer the repository to the Apache Incubator under the Teaclave project
• Code cleanup and more documentation

Meritocracy:​

Teaclave Java TEE SDK project was originally developed and reviewed by Shaojun Wang/Ziyi Lin/Lei Yu/Sanhong Li within Alibaba Cloud. We encourage everyone to ask questions and create pull requests for the project.

Community:​

Teaclave Java TEE SDK was developed and applied within Alibaba Cloud before it was donated to Teaclave.

Core Developers:​

The core developers are:

• Shaojun Wang (jeffery.wsj@alibaba-inc.com)
• Ziyi Lin (cengfeng.lzy@alibaba-inc.com)

Alignment:​

The project is complimentary of Teaclave's TEE backends.

Known Risks​

An exercise in self-knowledge. Risks don't mean that a project is unacceptable. If they are recognized and noted, then they can be addressed during incubation.

Project Name​

Teaclave Java TEE SDK was initially developed and applied within Alibaba Cloud as a closed-source project which was called JavaEnclave.

Inexperience with Open Source:​

Teaclave Java TEE SDK has been reviewed by Mingshen Sun, who is from the Teaclave community. He's familiar with The Apache Way for the open-source community.

Length of Incubation:​

The project will be in incubation with Apache Teaclave (incubating) project.

Documentation​

• Teaclave Java TEE SDK's documentation will be submit to Teaclave PPMC for review by email private@teaclave.apache.org

Initial Source​

• Teaclave Java TEE SDK's source code will be submit to Teaclave PPMC for review by email private@teaclave.apache.org

Source and Intellectual Property Submission Plan​

We will submit a Software Grant for this project later.

External Dependencies:​

The dependencies have Apache compatible license, which is provided under the BSD 2-Clause license and GPL2.0 license. One dependency of Teaclave Java TEE SDK is GraalVM SubstraceVM with GPL2.0 license, it's used as the enclave module's native image compiler, and Teaclave Java TEE SDK has contributed some patches to GraalVM and they had been contained in GraalVM's official releases assets. Teaclave Java TEE SDK is dependent on GraalVM's official releases and doesn't make any modifications to GraalVM's source code, so there's no legal risk. https://www.apache.org/legal/resolved.html

Cryptography:​

N/A

Required Resources​

Mailing lists:​

The project shares the same mailing list of Teaclave.

Git Repositories:​

• N/A

Issue Tracking:​

Same with Teaclave.

Other Resources:​

N/A

Initial Committers​

• Shaojun Wang (jeffery.wsj@alibaba-inc.com)
• Ziyi Lin (cengfeng.lzy@alibaba-inc.com)
• Lei Yu (lei.yul@alibaba-inc.com)
• Sanhong Li (sanhong.lsh@alibaba-inc.com)

Agenda​

Dear Teaclave community,

Since some members have conflicts on tomorrow's meetup and suggested scheduling the meetup today, let's have an informal meet today at 7:00am PT (10am China Time).

There's no presentation today. Let's just have a chitchat and discuss recent updates in the community. Thanks.

Agenda​

• Recent Updates on Teaclave - Mingshen Sun (10m)
• Enarx - Wenwen Ruan (40m)
• Free discussion (10m)

Attendees​

• Mingshen Sun
• Shuang Liu
• He Sun
• Weijie Liu
• Gordon
• Tongxin Li
• Wenhao Wang
• Ukei Kim

Group Photo​

On behalf of the Teaclave community, I am happy to announce the fourth Apache Incubator release of Teaclave, 0.4.0. Teaclave is a universal secure computing platform, making computation on privacy-sensitive data safe and simple. Apache Teaclave (including the FaaS platform, SGX SDK, and TrustZone SDK) is being used and contributed by developers from many organizations and other open source projects. Please see the powered by page to learn more.

In this release, we mainly focus on better user management, task management, performance improvement and stability.

Highlights​

In this release, we introduce a role-based access control for user management. Specifically, we define roles like admin, function owner, data owner, data owner manager, etc. Additionally, we also add APIs to support user management functionalities. In addition, we also implement a feature to cancel a running task to kill a long-run function which is no longer needed. Besides these two new features, we also made a lot of underlying changes to improve the performance of RPC and stability of the secure database.

To learn more, here is a list of notable changes in Teaclave version 0.4.0.

Features

• Add the DisableFunction interface (#620)
• Better user management interfaces: add the UserUpdate, UserChangePassword, ResetUserPassword, DeleteUser, and ListUsers interfaces
• Support optional input/output files (#603)
• Start Teaclave docker services with auto-detection mechanism (#559)
• Add watchdog functionality to monitor service status (#600)
• Support cancel a task
• Support intermediate cert in DCAP attestation cert

Enhancements

• Better error handling in Python client SDK (#632)
• Refactor services error types and messages, make them readable to end users
• Optimize RPC memory footprint of serde (#577)
• Support selectively including executors (#574)
• Support AES-GCM output files (#629)
• Add port probe for service launching
• Update WAMR version to WAMR-01-18-2022 (#616)
• Move execution context into a separate crate (#598)
• Support Ubuntu 20.04 docker image and add corresponding CI pipelines
• Persistent MockDB in test mode (#580)

Bug Fixes

• Better task state error and fix cancel error issue in the example (#637)
• Fix privilege issues in the GetFunction and ListFunctions interfaces (#636)
• Better building system: fix packages rebuild every time, avoid issues in parallel make (#589, #596)
• Fix the issue of generating code coverage of tests (#627)
• Fix LevelDB assertion issue: leveldb lru bug, using disk db for unit test (#583)

Docs

• Add release guide for releasing Teaclave in the community: https://teaclave.apache.org/docs/release-guide/
• Remove CONTRIBUTORS.md and point to the homepage (#552)

Download​

Teaclave 0.4.0 can be downloaded at the download page. Note that it is essential to verify the integrity of the downloaded file using the PGP signature (the .asc file) or a hash (the .sha256 file).

Documentation​

If it is the first time to try Teaclave, we provide a simple but clear tutorial to guide you getting stated with Teaclave by invoking your first function in Teaclave.

Basically, you can build the Teaclave platform using docker with these commands:

$ tar zxvf apache-teaclave-0.4.0-incubating.tar.gz && cd \
  apache-teaclave-0.4.0-incubating
$ # Instructions to verify the source tar: https://teaclave.apache.org/download/#verify-the-integrity-of-the-files

$ docker run --rm -v $(pwd):/teaclave -w /teaclave \
  -it teaclave/teaclave-build-ubuntu-1804-sgx-2.14:latest \
   bash -c ". /root/.cargo/env && \
     . /opt/sgxsdk/environment && \
     mkdir -p build && cd build && \
     cmake -DTEST_MODE=ON -DSGX_SIM_MODE=ON -DGIT_SUBMODULE=OFF .. && \
     make"

Launch all services with docker-compose using simulation mode:

$ (cd docker && docker-compose -f docker-compose-ubuntu-1804-sgx-sim-mode.yml up --build)

And invoke function with a Python client:

$ cd examples/python
$ PYTHONPATH=../../sdk/python python3 builtin_echo.py 'Hello, Teaclave!'
[+] registering user
[+] login
[+] registering function
[+] creating task
[+] approving task
[+] invoking task
[+] getting result
[+] done
[+] function return:  b'Hello, Teaclave!'

If you want to understand the internals of Teaclave, we provide several documents about the design of Teaclave. Also, we extensively document our codebase in each sub directories. At last, API references are automatically generated and uploaded to our homepage.

Community​

• Join us on our mailing list and Discord channel.
• Follow us at @ApacheTeaclave.
• Meet us at our monthly community meetup.
• See more.

On behalf of the Teaclave community, I am happy to announce the release of Teaclave TrustZone SDK 0.2.0.

Teaclave TrustZone SDK provides abilities to build safe TrustZone applications in Rust. The SDK is based on the OP-TEE project which follows GlobalPlatform TEE specifications and provides ergonomic APIs. In addition, it enables capability to write TrustZone applications with Rust's standard library and many third-party libraries (i.e., crates). Teaclave TrustZone SDK is a sub-project of Apache Teaclave (incubating). To learn more about the design and history of TrustZone SDK, please read the blog Welcome Rust OP-TEE TrustZone SDK To Teaclave.

This is the second Apache Incubator release of Teaclave TrustZone SDK. Teaclave TrustZone SDK provides abilities to build safe TrustZone applications in Rust. The SDK is based on the OP-TEE project which follows GlobalPlatform TEE specifications and provides ergonomic APIs. In addition, it enables the capability to write TrustZone applications with Rust's standard library and many third-party libraries (i.e., crates). Teaclave TrustZone SDK is a sub-project of Apache Teaclave (incubating).

During this period, we are working closely with the OP-TEE community to integrate TA examples written in Rust into the upstream repository. You can try and play with the examples written in Rust with Teaclave TrustZone SDK since the OP-TEE 3.15.0 release.

More specifically, in this release we have the following updates:

Features​

• Add support for tee-supplicant loadable plugins and examples
• Add TEE Socket APIs and examples

Enhancements​

Integration into OP-TEE​

• Add the -rs suffix to examples and update test scripts (#34)
• Update to OP-TEE 3.14.0 (#35)
• Update to OP-TEE 3.16.0 (#59)

Building​

• Upgrade building docker to Ubuntu 20.04 (#33)
• Update Rust toolchain to nightly-2021-09-20 and std to 1.56.1 (#53)
• Add setup.sh to setup rust environment and initialize submodules (#40, #63)

CI​

• Switch to GitHub Actions (#33)
• Add expect script for OP-TEE CI and fix CI errors (#45, #50)

Bug fixes​

• Fix ldelf error of arm32 ta (#38)
• fix error when making the plugin example second time (#42)
• Correct toolchain PATH env (#44)

Docs​

• Add debugging OP-TEE TA doc: Debugging OP-TEE TA
• Add documentation of Rust examples: Overview of OP-TEE Rust Examples
• Polish the getting started documentation

Download​

You can download the release from the download page. Also, please checkout our repository hosted on GitHub.

Contributing​

Teaclave TrustZone SDK is under the Apache License v2 and open source in The Apache Way. We aim to create a project that is maintained and owned by the community. All kinds of contributions are welcome. Thanks to our contributors.

Agenda​

• Recent Updates on Teaclave - Mingshen Sun (10m)
• HyperEnclave - Shuang Liu (40m)
• Free discussion (10m)

Attendees​

• Mingshen Sun
• Ran Duan
• He Sun
• Weijie Liu
• Shuang Liu
• Bing Duan

Group Photo​

Agenda​

• Recent Updates on Teaclave - Mingshen Sun (15m)
• Proof of Being Forgotten: Verified Privacy Protection in Confidential Computing Platform - Hongbo Chen (30m)
• Free discussion (15m)

Notes​

Teaclave Recent Updates

• Teaclave FaaS
  • Optimize RPC memory footprint of serde
  • Server error refactoring
  • Executor watchdog
  • Task canceling
  • APIs: list_users, delete_user, reset_user, user_change_password, disable_function
  • Optional input/output files
• Teaclave TrustZone SDK
  • Update to OP-TEE 3.16.0 (no breaking change)
• GSoC 2022 call for participation
• Powered by Teaclave - P4Cleanroom: P4Cleanroom is a confidential cloud service for hosting computational biology algorithms as SaaS services on the cloud. Computational biology researchers can publish their algorithms on P4Cleanroom as a SaaS service to customers, such as researchers in pharmaceutical companies and health care institutes.

Proof of Being Forgotten

The talk is same with the recent talk on OC3. Video can be found at:

• Video: https://www.youtube.com/watch?v=NrOySgI7O3o&list=PLEhAl3D5WVvSD7Kh1lyF95dWmcPICXc2u

Q&A during the talk:

Gary: Assumption on reusing TEE sandbox?

Hongbo: No, if not reuse TEE, still has leakage.

Gary: What is Zone, is it heap?

Hongbo: No only. E.g., secrets in stack and also in general purpose registers.

Gary: How to demonstrate/show the Proof of Being Forgotten? Attestation? Enclave hash?

Mingshen: PoBF is a statically verified property. We also consider to add dynamic traces for post-mortem auditing. Combined with the enclave hash and reproducible build, we can provide the proof before the execution statically, and after the execution dynamically.

Topic for the Next Meetup

• HyperEnclave in Ant Finance - Shuang Liu

Attendees​

• Hongbo Chen
• Gary
• Ran Duan
• He Sun
• Ruide Zhang
• Weijie Liu
• Chan Zhao