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| permalink: /docs/codebase/dcap |
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| # Data Center Attestation Service |
| |
| This directory includes a reference implementation of data center attestation |
| service using |
| [Intel SGX Data Center Attestation Primitives](https://software.intel.com/en-us/blogs/2019/05/21/intel-sgx-datacenter-attestation-primitives) (DCAP), |
| which allows third-parties to create their own attestation infrastructure for |
| the datacenter and cloud. Compared to Intel Attestation Service (IAS), DCAP |
| Attestation Service is for environment where internet services is not accessible |
| and entities who are unwilling to outsource trust decisions to third-parties |
| (like Intel's IAS). |
| |
| By default, Intel Attestation Service (IAS) will be used for attestation in |
| Teaclave. To use DCAP instead of IAS, you have to first build Teaclave with DCAP |
| enabled (by appending `-DDCAP=ON` option to `cmake`) and deploy in |
| infrastructure with DCAP supported. |
| |
| The Intel's [DCAP Installation Guide](https://download.01.org/intel-sgx/sgx-dcap/1.14/linux/docs/Intel_SGX_SW_Installation_Guide_for_Linux.pdf) |
| contains instructions to install essential dependencies for developers. Also, |
| you need to prepare environment in your infrastructure before deploying a |
| DCAP-enabled application. |
