# PX4 Log Encryption {% embed url="" %} ### Creating PX4 Board files for Encrypted logs ``` git clone --recurse-submodules git@github.com:PX4/PX4-Autopilot.git ``` Generate your Private and Public Key ``` cd PX4-Autopilot/Tools/log_encryption python3 generate_keys.py ``` You can find your keys in ``` PX4-Autopilot/ │ ├── keys/ │ ├── private/ │ │ ├── private_key.pem # RSA private key (2048-bit) │ │ │ ├── public/ │ │ ├── public_key.der # Public key in DER format │ │ ├── public_key.pub # Public key in hex format ``` The ARK flight controllers have targets setup for encryption You should navigate to ``` PX4-Autopilot/boards/ark ``` * ARK FPV * ARKV6X * ARKPI6X You should replace the Dummy Key with your own Public Key in the following file ``` encrypted_logs.px4board ``` ``` CONFIG_PUBLIC_KEY1="../../../keys/public/public_key.pub" ``` Then you can go ahead and make your board file ``` make ark_fpv_encrypted_logs OR make ark_fmu-v6x_encrypted_logs OR make ark_pi6x_encrypted_logs ``` Once that is done you can find your build file in ``` PX4-Autopilot/build/*.px4 ``` You can go ahead and flash it on your flight controller. ### Downloading and Decrypting log files The encrypted logs can be found on the SD card in .ulge format. You can either extract the files directly from the SD card our use the log tool provided below Addresses might need to be adjusted ``` cd PX4-Autopilot/Tools/log_encryption python3 download_logs.py /dev/ttyACM0 --baudrate 57600 OR python3 download_logs.py udp:0.0.0.0:14550 ``` To Decrypt the logs you can use ``` cd PX4-Autopilot/Tools/log_encryption AND # Uses default key + default folder python3 decrypt_logs.py OR # Use --help to get all the options python3 decrypt_logs.py --help ``` Your logs can be found in the following structure ``` PX4-Autopilot/ │ ├── logs/ │ ├── encrypted/ │ │ ├── log-YYYY-MM-DD_HH-MM-SS_ID.ulge │ │ │ ├── decrypted/ │ │ ├── log-YYYY-MM-DD_HH-MM-SS_ID.ulg ``` Once you've decrypted your logs, you can view them using your preferred method. ### Flight Review {% embed url="" %} If you choose to use Flight Review, you can embed your Private Key on your local Flight Review server, allowing your encrypted logs to be decrypted automatically when the .ulge is uploaded . ``` git clone --recurse-submodules git@github.com:PX4/flight_review.git ``` You should follow these steps ``` cd flight_review/app pip install -r requirements.txt # Note: preferably use a virtualenv ./app/setup_db.py ``` Add your Private Key to ``` flight_review/app/private_key/private_key.pem ``` Then you need to edit, the config file. There you can define your own network setup (Domain, VPN, etc). ``` flight_review/app/config_default.ini ``` You have to update the Private Key path with your own. ``` ulge_private_key = ../private_key/private_key.pem ``` Once you are done you can just open your server using ``` cd app ./serve.py --show ``` Once you have your server ready you can upload the Encrypted logs and view them. Optionally you can also integrate logloader developed by ARK. The repository can be found here: You should specify your server in the config file ``` logloader/config.toml ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.arkelectron.com/knowledge-base/knowledge-base/px4-log-encryption.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.