This repository contains our team's implementation for the eCTF '25 TV Decoder System challenge. Our solution focuses on a secure and efficient decoder for satellite TV frame data, implemented on the MAX78000FTHR board. We've developed a novel encryption scheme, detailed in our design document, to meet the challenge requirements while prioritizing security and performance.
To setup your environment, run
pip install ./designTo generate secrets, run
python -m ectf25_design.gen_secrets global.secrets <channel_id_1> <channel_id_2> ...Warning
Please ensure this is run in the parent directory, to ensure global.secrets is generated in the parent directory.
This step is essential to build the decoder firmware.
To generate a subscription for a specific channel and timestamp range, use the following workflow
python -m ectf25_design.gen_subscription global.secrets <path/to/subscription/binary> <DECODER_ID> <start_timestamp> <end_timestamp> <channel_id>To build the decoder firmware, use the following workflow
cd ./decoder
make DECODER_ID=<DECODERID_in_decimal_or_hex>Note
The output binary will be located at ./decoder/build/max78000.bin
- Arivoli Ramamoorthy
- Abhinav I S
- Sanjeev Subrahmaniyan
- Madhav Tadepalli
- Nithin Ken Maran
- Kevin Kinsey
- Athish Pranav Dharmalingam
- Md. Isfarul Haque
- Mohitabinav M.
- Nitin G
