Operation
Handling
noun
If you manipulate the things you make, you are in operation of said things.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
他人にスマフォの遠隔操作を可能にさせるバックドアを発見しました。
Someone found a backdoor that enables remote operation of your smartphone.