Secret Filming
Noun and する verb
とうさつ
電車内で居眠りしているところを盗撮されたんです。
Photos were taken of me in secret while I was napping on the train.
Stealing photographs of you. Wait, you didn't know you were being photographed / filmed? That's secret photography or secret filming Creeeeeepy.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.