The radio interface for the SimpliSafe home burglar/fire alarm systems is not encrypted and does not use “rolling codes,” nonces, two-way handshakes, or other techniques to prevent transmissions from being recorded and reused. An attacker who is able to intercept the radio signals between the keypad and base station can record and re-play the signal in order to turn off the alarm at a time of his choice in the future.
ADVISORIES | February 17, 2016