00369nas a2200157   4500000000100000000000100001008004100002260001500043100001200058700001700070700001200087700001000099245008200109300001400191490000600205       2019                            d  cApril 20191 aZ. Zhou1 aWenwen Zhang1 aZ. Yang1 aN. Yu00aOptical exfiltration of data via keyboard LED status indicators to IP cameras  a1541-15500 v6