Night_Owl

Ural owl Strix uralensis

Documented by yan0kyan0k.

Professor Falcon teaches CPSC401 (Wireless Security) at Benevolent Bureau of Birds University and uses clicker devices for attendance. Students have remote controls that transmit answers wirelessly at 917 MHz using frequency hopping spread spectrum (FHSS).

This semester, the professor discovered two types of cheaters:

Speed Clickers: Students who click instantly (<2 seconds) without reading questions. They just mash random buttons for attendance credit.

Night Owls: Students who pre-record their clicker signals at home, then replay them late in class using a different device.

Legitimate students: respond in 2-15 seconds - normal human reading and thinking time.

During yesterday's lecture (March 29, 2026 at 2:30 PM), Professor Falcon's base station captured 20 seconds of RF traffic and logged every received packet with metadata. The legitimate students have hidden a message in their responses.

Your mission: separate cheaters from legitimate students.

Note: the recovered message is the flag body, not the full submission string. Submit it wrapped as bbb{recovered_message}.