Pocket CTFRiver Station 14

Reference Switch track

ECHO IN THE RAIN

ECHO IN THE RAIN

Task: Identify the replayed message and submit two observations that establish replay.

Evidence locker

telemetry.jsonl

FINDING OPEN

Replayed message ID

Choose two pieces of replay evidence Repeated sequence number Identical authenticated payload/MAC Same sensor time at different receipt times High reading by itself

Need a nudge?