This project focuses on secure communication between a Windows driver and a hardware device using the CP2102N USB-UART bridge. The primary goals are to generate a 10-bit OTP (One-Time Password) based on date-time, hardware ID, and a private key, and to ensure secure boot and flash encryption. Additionally, the project involves time synchronization with NTP servers and verification of OTP passwords using a challenge-response model.
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Project Overview:
- Provide a brief introduction to your project. Explain its purpose, key features, and any relevant context.
- Mention that the project involves communication between a Windows driver and a device using the CP2102N USB-UART bridge.
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Hardware and Software Requirements:
- List the hardware components (e.g., CP2102N, ATECC608A, esp32-s3, DS1339U-33+T&R) required for your project.
- Specify any software dependencies (e.g., ESP-IDF, Windows 10 drivers).
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Communication with Windows Driver:
- Describe how the CP2102N USB-UART bridge facilitates communication between the device and the Windows driver.
- Mention the shared VID/PID and the use of
uart_async_rxtxtasks.
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OTP Generation and Security:
- Explain how the 10-bit OTP is generated based on date-time, hardware ID, and a private key.
- Discuss the importance of secure boot and flash encryption.
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ATECC608A Integration:
- Detail how the private key is stored in the ATECC608A CryptoAuthentication device.
- Highlight the steps involved in saving the private key if the Windows driver sends it.
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OTP Verification and Challenge-Response Model:
- Describe how the OTP password is verified using a challenge-response security model.
- Explain the role of HMAC authentication codes.
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Time Synchronization with NTP Servers:
- Discuss the need to sync the device's RTC (DS1339U-33+T&R) with NTP servers.
- Specify the NTP servers (e.g., ntp.time.nl, ntp1.time.nl, ntp2.time.nl) you plan to use.
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Hardware Connections:
- Provide a visual representation or a table showing how the ATECC608A, esp32-s3, DS1339U-33+T&R, and CP2102N are connected.
- Include pin mappings (e.g., I2C SCL/SDA, GPIO connections).
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Example Code and Implementation:
- Create a dedicated section with step-by-step instructions for setting up the project.
- Include code snippets or links to relevant files (e.g., ESP-IDF code, Windows driver code).
- Explain how to compile and run the project.
- Consider creating a separate folder in your repository for code examples.
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Final Notes and Acknowledgments:
- Conclude your README with any additional information, acknowledgments, or credits.
- Encourage contributions, bug reports, and feedback from the community.