TY - JOUR AU - Z. Zhou AU - Wenwen Zhang AU - Z. Yang AU - N. Yu BT - IEEE Internet of Things Journal DA - April 2019 IS - 2 LA - eng PY - 2019 SP - 1541 EP - 1550 T2 - IEEE Internet of Things Journal TI - Optical exfiltration of data via keyboard LED status indicators to IP cameras VL - 6 ER -