Echoes

Two chips tried to talk at once. Now their argument is your problem.

Hint: Echoes do not speak one segment at a time.

The three PRBS reference intervals reveal a five-step history in the analog signal. Use this learned model to decode the two unknown intervals as a path through four states:

NONE, A, B, and AB

When you have stream candidates, bind them with:

stream_a + stream_b + public_nonce

Then verify the HMAC tag stored in eeprom.bin.

All required files are already provided: session.ecap, transaction.json, and eeprom.bin.