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| <li class="toctree-l1"><a class="reference internal" href="../../index.html">1. NXP Plug & Trust Middleware</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../organization-of-documentation.html">1.1. Organization of Documentation</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../folder-structure.html">1.2. Folder Structure</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../sw-prerequisites.html">1.3. List of Platform Prerequisites</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../changes/index.html">2. Changes</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/pending.html">2.1. Pending Refactoring items</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/pending.html#known-limitations">2.2. Known limitations</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v03_00_05.html">2.3. Release <code class="docutils literal notranslate"><span class="pre">v03.00.05</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v03_00_04.html">2.4. Release <code class="docutils literal notranslate"><span class="pre">v03.00.04</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v03_00_03.html">2.5. Release <code class="docutils literal notranslate"><span class="pre">v03.00.03</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v03_00_02.html">2.6. Release <code class="docutils literal notranslate"><span class="pre">v03.00.02</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_16_01.html">2.7. Release <code class="docutils literal notranslate"><span class="pre">v02.16.01</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_16_00.html">2.8. Release <code class="docutils literal notranslate"><span class="pre">v02.16.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_15_00.html">2.9. Release <code class="docutils literal notranslate"><span class="pre">v02.15.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_14_00.html">2.10. Release <code class="docutils literal notranslate"><span class="pre">v02.14.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_12_00.html">2.11. Release <code class="docutils literal notranslate"><span class="pre">v02.12.05</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_12_00.html#release-v02-12-04">2.12. Release <code class="docutils literal notranslate"><span class="pre">v02.12.04</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_12_00.html#release-v02-12-03">2.13. Release <code class="docutils literal notranslate"><span class="pre">v02.12.03</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_12_00.html#release-v02-12-02">2.14. Release <code class="docutils literal notranslate"><span class="pre">v02.12.02</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_12_00.html#release-v02-12-01">2.15. Release <code class="docutils literal notranslate"><span class="pre">v02.12.01</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_12_00.html#release-v02-12-00">2.16. Release <code class="docutils literal notranslate"><span class="pre">v02.12.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_11_03.html">2.17. Release <code class="docutils literal notranslate"><span class="pre">v02.11.03</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_11_01.html">2.18. Internal Release <code class="docutils literal notranslate"><span class="pre">v02.11.01</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_11_00.html">2.19. Release <code class="docutils literal notranslate"><span class="pre">v02.11.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_10_00.html">2.20. Release <code class="docutils literal notranslate"><span class="pre">v02.10.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_09_00.html">2.21. Release <code class="docutils literal notranslate"><span class="pre">v02.09.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_07_00.html">2.22. Release <code class="docutils literal notranslate"><span class="pre">v02.07.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_06_00.html">2.23. Release <code class="docutils literal notranslate"><span class="pre">v02.06.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_05_00_to_v02_03_00.html">2.24. Release <code class="docutils literal notranslate"><span class="pre">v02.05.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_05_00_to_v02_03_00.html#release-v02-04-00">2.25. Release <code class="docutils literal notranslate"><span class="pre">v02.04.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../changes/v02_05_00_to_v02_03_00.html#release-02-03-00">2.26. Release <code class="docutils literal notranslate"><span class="pre">02.03.00</span></code></a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1 current"><a class="reference internal" href="../index.html">3. Plug & Trust MW Stack</a><ul class="current"> |
| <li class="toctree-l2"><a class="reference internal" href="../features.html">3.1. Features</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../features.html#plug-trust-mw-block-diagram">3.2. Plug & Trust MW : Block Diagram</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../sss-apis.html">3.3. SSS APIs</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../se05xfeatures.html">3.4. SSS APIs: SE051 vs SE050</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../param_checks.html">3.5. Parameter Check & Conventions</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../i2cm.html">3.6. I2CM / Secure Sensor</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../logging.html">3.7. Logging</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../feature-file.html">3.8. Feature File - <code class="docutils literal notranslate"><span class="pre">fsl_sss_ftr.h</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../platf-scp-from-fs.html">3.9. Using Platform SCP Keys from File System</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="auth-objects.html">3.10. Auth Objects</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="auth-objects-userid.html">3.11. Auth Objects : UserID</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="auth-objects-aeskey.html">3.12. Auth Objects : AESKey</a></li> |
| <li class="toctree-l2 current"><a class="current reference internal" href="#">3.13. Auth Objects : ECKey</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../key-id-range.html">3.14. Key Id Range and Purpose</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../key-id-range.html#authentication-keys">3.15. Authentication Keys</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../key-id-range.html#trust-provisioned-keyids">3.16. Trust provisioned KeyIDs</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../sss/ex/doc/puf-scp03.html">3.17. SCP03 with PUF</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../sss/doc/sss_heap_management.html">3.18. SSS Heap Management</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../building/index.html">4. Building / Compiling</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../building/windows.html">4.1. Windows Build</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../building/frdm-k64f-sdk.html">4.2. Import MCUXPresso projects from SDK</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../building/frdm-k64f-cmake.html">4.3. Freedom K64F Build (CMake - Advanced)</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../building/imx6.html">4.4. i.MX Linux Build</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../building/rpi3.html">4.5. Raspberry Pi Build</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../building/cmake.html">4.6. CMake</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../scripts/cmake_options.html">4.7. CMake Options</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../demos/index.html">5. Demo and Examples</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#demo-list">5.1. Demo List</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#sss-api-examples">5.2. SSS API Examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#cloud-demos">5.3. Cloud Demos</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#linux-specific-demos">5.4. Linux Specific Demos</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#opc-ua-example">5.5. OPC-UA Example</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#arm-psa-example">5.6. ARM PSA Example</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#se05x-examples">5.7. SE05X Examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#openssl-examples">5.8. OpenSSL Examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#tests-for-user-crypto">5.9. Tests for User Crypto</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#nxpnfcrdlib-examples">5.10. NXPNFCRDLIB examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#ease-of-use-examples">5.11. Ease-of-Use examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#semslite-examples">5.12. Semslite examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/index.html#puf-examples">5.13. PUF examples</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../edgelock2go-agent.html">6. NXP EdgeLock 2GO Agent</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../nxp_iot_agent/doc/introduction.html">6.1. Introduction</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../nxp_iot_agent/doc/introduction.html#building-and-running-the-edgelock-2go-agent">6.2. Building and running the EdgeLock 2GO agent</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../nxp_iot_agent/doc/introduction.html#datastore-keystore">6.3. Datastore / Keystore</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../nxp_iot_agent/doc/introduction.html#connection-to-the-edgelock-2go-cloud-service">6.4. Connection to the EdgeLock 2GO cloud service</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../nxp_iot_agent/doc/introduction.html#claim-codes">6.5. Claim Codes</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../nxp_iot_agent/doc/edgelock2go_agent_apis.html">6.6. API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../nxp_iot_agent/doc/readme_usage_examples.html">6.7. Usage Examples</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../semslite/doc/index.html">7. SEMS Lite Agent</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../semslite/doc/sems_lite_overview.html">7.1. SEMS Lite Overview (Only for SE051)</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../semslite/doc/sems_lite_package.html">7.2. Update Package</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../semslite/doc/sems_lite_usage.html">7.3. SEMS Lite Agent Usage</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../semslite/doc/sems_lite_mgmt_api.html">7.4. SEMS Lite management APIs</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../semslite/doc/sems_lite_process.html">7.5. SEMS Lite Agent Package Load Process</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../semslite/doc/sems_lite_api.html">7.6. APIs</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../semslite/doc/sems_lite_known_issue.html">7.7. SEMS Lite Known Issue</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../semslite/doc/demo_update.html">7.8. SEMS Lite DEMOs</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../plugins/index.html">8. Plugins / Add-ins</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../sss/plugin/openssl/scripts/readme.html">8.1. Introduction on OpenSSL engine</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../sss/plugin/mbedtls/scripts/readme.html">8.2. Introduction on mbedTLS ALT Implementation</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../sss/plugin/psa/Readme.html">8.3. Platform Security Architecture</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../plugins/akm.html">8.4. Android Key master</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../sss/plugin/open62541/readme.html">8.5. Introduction on Open62541 (OPC UA stack)</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../plugins/wifiEAP/wifiEAP.html">8.6. WiFi EAP Demo with Raspberry Pi3</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../plugins/pkcs11.html">8.7. PKCS#11 Standalone Library</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../cli-tool.html">9. CLI Tool</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../pycli/doc/introduction.html">9.1. Introduction</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../pycli/doc/block-diagram.html">9.2. Block Diagram</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../pycli/doc/pre-steps.html">9.3. Steps needed before running <code class="docutils literal notranslate"><span class="pre">ssscli</span></code> tool</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../pycli/doc/running.html">9.4. Running the <code class="docutils literal notranslate"><span class="pre">ssscli</span></code> tool - Windows</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../pycli/Provisioning/readme.html">9.5. CLI Provisioning</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../pycli/doc/readme_usage_examples.html">9.6. Usage Examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../pycli/doc/cli_commands_list.html">9.7. List of <code class="docutils literal notranslate"><span class="pre">ssscli</span></code> commands</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../pycli/doc/cli_data_format.html">9.8. CLI Data formats</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../pycli/doc/cli_object_policy.html">9.9. Object Policies Through ssscli</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../appendix/upload_se05x_using_pycli.html">9.10. Upload keys and certificates to SE05X using ssscli tool</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../a71ch.html">10. A71CH</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../a71ch/a71ch_sss.html">10.1. A71CH and SSS API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../a71ch/a71ch_miscellaneous.html">10.2. Miscellaneous</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../a71ch/a71ch_legacy_host_api.html">10.3. A71CH Legacy API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../a71ch/a71ch_legacy_hlse_api.html">10.4. A71CH Legacy HLSE (Generic) API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../a71ch/a71ch_configure_tool.html">10.5. A71CH Legacy Configure Tool</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../appendix.html">11. Appendix</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../appendix/glossary.html">11.1. Glossary</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../appendix/vcom.html">11.2. APDU Commands over VCOM</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../appendix/vs2019-setup.html">11.3. Visual Studio 2019 Setup</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../appendix/ide_mcux.html">11.4. Setting up MCUXPresso IDE</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../dev-platforms.html">11.5. Development Platforms</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../appendix/se_uid.html">11.6. How to get SE Platform Information and UID</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../appendix/version_info.html">11.7. Version Information</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../demos/Certificate_Chains/Readme.html">11.8. Certificate Chains</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../appendix/rjct_server.html">11.9. JRCP_v1 Server</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../appendix/platfscp.html">11.10. Using own Platform SCP03 Keys</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../appendix/apdu_write_to_buffer.html">11.11. Write APDU to buffer</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../api/api_list.html">11.12. Plug & Trust MW APIs</a></li> |
| </ul> |
| </li> |
| </ul> |
| </ul> |
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| <div class="section" id="auth-objects-eckey"> |
| <span id="id1"></span><h1><span class="section-number">3.13. </span>Auth Objects : ECKey<a class="headerlink" href="#auth-objects-eckey" title="Permalink to this headline">¶</a></h1> |
| <p>ECKey is secure channel protocol tailored for secured authentication and |
| communication between a Host and a connected SE.</p> |
| <p>Please contact NXP CAS/FAE for the specification of ECKey.</p> |
| <dl class="simple"> |
| <dt>The Secure Channel Protocol consists of two logical phases:</dt><dd><ol class="arabic simple"> |
| <li><p>Authentication phase</p></li> |
| <li><p>Secure messaging phase</p></li> |
| </ol> |
| </dd> |
| </dl> |
| <div class="section" id="eckey-keys-used"> |
| <h2><span class="section-number">3.13.1. </span>ECKey - Keys Used<a class="headerlink" href="#eckey-keys-used" title="Permalink to this headline">¶</a></h2> |
| <p>The table below gives an overview of the required keys and their presence at |
| SE and Host as required for the ECKey setup, authentication phase</p> |
| <table class="colwidths-given docutils align-default" id="id2"> |
| <caption><span class="caption-text">Auth Keys</span><a class="headerlink" href="#id2" title="Permalink to this table">¶</a></caption> |
| <colgroup> |
| <col style="width: 25%" /> |
| <col style="width: 13%" /> |
| <col style="width: 13%" /> |
| <col style="width: 50%" /> |
| </colgroup> |
| <thead> |
| <tr class="row-odd"><th class="head"><p>key</p></th> |
| <th class="head"><p>SE</p></th> |
| <th class="head"><p>Host</p></th> |
| <th class="head"><p>Purpose</p></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="row-even"><td><p>SK.SE.ECKA</p></td> |
| <td><p>√</p></td> |
| <td></td> |
| <td><p>Static SE key pair for Key Agreement Private key</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>PK.SE.ECKA</p></td> |
| <td><p>√</p></td> |
| <td><p>√</p></td> |
| <td><p>Static SE key pair for Key Agreement Public key</p></td> |
| </tr> |
| <tr class="row-even"><td><p>SK.Host.ECDSA</p></td> |
| <td></td> |
| <td><p>√</p></td> |
| <td><p>Host signing key pair Private key</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>PK.Host.ECDSA</p></td> |
| <td><p>√</p></td> |
| <td></td> |
| <td><p>Host signing key pair Private key</p></td> |
| </tr> |
| <tr class="row-even"><td><p>eSK.Host.ECKA</p></td> |
| <td></td> |
| <td><p>√</p></td> |
| <td><p>Ephemeral private key of the Host used for key agreement</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>ePK.Host.ECKA</p></td> |
| <td></td> |
| <td><p>√</p></td> |
| <td><p>Ephemeral public key of the Host used for key agreement</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="eckey-use-for-connection-authentication"> |
| <h2><span class="section-number">3.13.2. </span>ECKey - Use for connection / authentication<a class="headerlink" href="#eckey-use-for-connection-authentication" title="Permalink to this headline">¶</a></h2> |
| <dl class="simple"> |
| <dt>Authentication Phase:</dt><dd><ol class="arabic simple"> |
| <li><p>In the Secure Channel authentication phase, a Host-generated ephemeral |
| key pair, the static SE key pair and SE-generated random data are used |
| to compute a shared master secret</p></li> |
| <li><p>The Host generates an ephemeral ECC key pair and exchanges the public |
| key component ePK.Host.ECKA with the SE. The ePK.Host.ECKA is signed to |
| prove its authenticity.</p></li> |
| <li><p>Both the Host and the SE compute the shared secret ShS from |
| (eSK.Host.ECKA , PK.SE.ECKA) and (SK.SE.ECKA, ePK.Host.ECKA) |
| respectively.</p></li> |
| <li><p>The SE generates random bytes DR.SE and exchanges this with the Host.</p></li> |
| <li><p>Both the Host and the SE compute the shared master secret MK from the |
| shared secret ShS and random bytes DR.SE.</p></li> |
| <li><dl class="simple"> |
| <dt>Optionally:</dt><dd><ol class="upperalpha simple"> |
| <li><p>Both Host and SE compute the Key-DEK.</p></li> |
| <li><p>Both Host and SE compute the S-RMAC session key (used for the receipt).</p></li> |
| <li><p>Both Host and SE compute the receipt.</p></li> |
| <li><p>The Host verifies the receipt.</p></li> |
| </ol> |
| </dd> |
| </dl> |
| </li> |
| </ol> |
| </dd> |
| <dt>Secure Messaging phase:</dt><dd><ol class="arabic simple"> |
| <li><p>In the Secure Channel secure messaging phase, first a setup is |
| performed, where the shared master secret is used to compute the AES |
| session keys (S-ENC, S-MAC and S-RMAC) and initialize the encryption |
| counter</p></li> |
| <li><p>Both the Host and the SE compute the AES session keys from MK.</p></li> |
| <li><p>Both the Host and the SE apply an OWF to MK. Note that this is performed |
| after the validation of the command’s C-MAC (to exclude DOS attacks on |
| the SE).</p></li> |
| <li><p>Both the Host and the SE initialize the encryption counter to 1 for the |
| first command/response with C-DECRYPTION or R-ENCRYPTION.</p></li> |
| <li><p>After the secure messaging setup has been performed, the AES session |
| keys are employed to realize SCP03 secure messaging between Host and SE</p></li> |
| <li><p>Command APDUs are MACed.</p></li> |
| <li><p>Response APDUs are optionally MACed.</p></li> |
| <li><p>Command and response APDUs are optionally encrypted. For each |
| command/response with C-DECRYPTION or R-ENCRYPTION, the encryption |
| counter is incremented.</p></li> |
| </ol> |
| </dd> |
| </dl> |
| <p>The phases inclusive the optional Key-DEK and receipt are shown in the figure |
| below</p> |
| <img alt="../../_images/auth-object-fastscp-use.png" src="../../_images/auth-object-fastscp-use.png" /> |
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