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| Events |
| <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></li></ul></div></div> <!----></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Try</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/my-first-function/" class="sidebar-link">My First Function</a></li><li><a href="/docs/functions-in-python/" class="sidebar-link">Write Functions in Python</a></li><li><a href="/docs/builtin-functions/" class="sidebar-link">How to Add Built-in Functions</a></li><li><a href="/docs/azure-confidential-computing/" class="sidebar-link">Deploying Teaclave on Azure Confidential Computing Virtual Machines</a></li><li><a href="/docs/executing-wasm/" class="sidebar-link">Executing WebAssembly in Teaclave</a></li><li><a href="/docs/inference-with-tvm/" class="sidebar-link">Inference Task with TVM in Teaclave</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading open"><span>Design</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/threat-model/" aria-current="page" class="active sidebar-link">Threat Model</a></li><li><a href="/docs/mutual-attestation/" class="sidebar-link">Mutual Attestation: Why and How</a></li><li><a href="/docs/access-control/" class="sidebar-link">Access Control in Teaclave</a></li><li><a href="/docs/build-system/" class="sidebar-link">Build System</a></li><li><a href="/docs/service-internals/" class="sidebar-link">Teaclave Service Internals</a></li><li><a href="/docs/adding-executors/" class="sidebar-link">Adding Executors</a></li><li><a href="/docs/papers-talks/" class="sidebar-link">Papers, Talks, and Related Articles</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Contribute</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/release-guide/" class="sidebar-link">Release Guide</a></li><li><a href="/docs/development-tips/" class="sidebar-link">Development Tips</a></li><li><a href="/docs/rust-guildeline/" class="sidebar-link">Rust Development Guideline</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Codebase</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/codebase/attestation/" class="sidebar-link">Attestation in Teaclave</a></li><li><a href="/docs/codebase/binder/" class="sidebar-link">Binder</a></li><li><a href="/docs/codebase/cli/" class="sidebar-link">Teaclave Command Line Tool</a></li><li><a href="/docs/codebase/common/" class="sidebar-link">Common Libraries</a></li><li><a href="/docs/codebase/config/" class="sidebar-link">Configurations in Teaclave</a></li><li><a href="/docs/codebase/crypto/" class="sidebar-link">Crypto Primitives</a></li><li><a href="/docs/codebase/dcap/" class="sidebar-link">Data Center Attestation Service</a></li><li><a href="/docs/codebase/docker/" class="sidebar-link">Teaclave Docker</a></li><li><a href="/docs/codebase/examples/" class="sidebar-link">Examples</a></li><li><a href="/docs/codebase/executor/" class="sidebar-link">Function Executors</a></li><li><a href="/docs/codebase/file-agent/" class="sidebar-link">File Agent</a></li><li><a href="/docs/codebase/function/" class="sidebar-link">Built-in Functions</a></li><li><a href="/docs/codebase/rpc/" class="sidebar-link">RPC</a></li><li><a href="/docs/codebase/runtime/" class="sidebar-link">Executor Runtime</a></li><li><a href="/docs/codebase/sdk/" class="sidebar-link">Client SDK</a></li><li><a href="/docs/codebase/services/" class="sidebar-link">Teaclave Services</a></li><li><a href="/docs/codebase/tests/" class="sidebar-link">Test Harness and Test Cases</a></li><li><a href="/docs/codebase/third-party/" class="sidebar-link">Third-Party Dependency Vendoring</a></li><li><a href="/docs/codebase/tools/" class="sidebar-link">Tools</a></li><li><a href="/docs/codebase/types/" class="sidebar-link">Types</a></li><li><a href="/docs/codebase/worker/" class="sidebar-link">Teaclave Worker</a></li></ul></section></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="threat-model"><a href="#threat-model" class="header-anchor">#</a> Threat Model</h1> <p>With its strongest security setting applied, Teaclave guarantees data |
| confidentiality even if all parties along the computation path, privileged or |
| not, are untrusted. This includes:</p> <ul><li>Internet service provider</li> <li>Cloud provider</li> <li>Function provider</li> <li>Other data providers</li></ul> <p>Specifically, most hardware (memory, disk, motherboard, etc.), operating system |
| (both kernel and software in userland), network channels, and provider employees |
| are untrusted.</p> <p>Consider the following scenario. A small business needs to employ image |
| classification techniques in its daily production. However, the business does |
| not have the capabilities to train a high-quality machine learning model, nor |
| does it have the hardware resources to host the machine learning |
| infrastructures. Under such circumstances, the only solution is to subscribe to |
| some cloud computing service and run the needed image classification tasks |
| remotely. However, this solution requires the small business to upload its |
| private data to the cloud, which may deeply concerns the business owner and |
| hinders the deployment of such techniques.</p> <p>With Teaclave, privacy concerns above are no more. The small business can |
| subscribe to the cloud service from company A, rent the machine learning model |
| from company B, and use the deep learning inference engine provided by company |
| C. None of these parties need to trust another, yet the computation can commence |
| with everyone's privacy respected.</p> <p>In the settings above, the root of trust converges to the enclave manufactures |
| (i.e., Intel) and its SGX-enabled CPU chips. Before the computation starts, |
| Teaclave is booted as a secure SGX enclave on one of these CPUs owned by the |
| cloud service provider. After that, each party can <em>remotely</em> attest the |
| authenticity of the hardware and the integrity of Teaclave platform through |
| attestation service (e.g., Intel Attestation Service). Private data are securely |
| provisioned to the Teaclave enclave only if the attestation passes. After the |
| provision, no privileged software is able to access the memory content owned by |
| the enclave from outside.</p> <p>The remote attestation functionality implemented by Teaclave is augmented from |
| the method described by a <a href="https://arxiv.org/abs/1801.05863" target="_blank" rel="noopener noreferrer">white paper</a>. In a |
| nutshell, enclaves in Teaclave will establish trusted channel on attested TLS |
| for communication. The complicated structure of Teaclave requires additional |
| work for remote attestation, which is explained in details via a separate |
| <a href="/teaclave/docs/mutual-attestation.html">documentation</a>.</p> <p>Side channels are out of scope for current Teaclave's implementation. While we |
| acknowledge that existing enclaves may be vulnerable to various kinds of side |
| channel attacks, we will try our best to mitigate existing attacks by adopting |
| software hardening.</p></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">Last Updated:</span> <span class="time">5/26/2020, 6:02:58 PM</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev"> |
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