B. By installing a roving bug on the phone.
A "roving bug" refers to malicious software or spyware installed on the phone that allows the hacker to remotely access the device's camera and microphone for surveillance purposes. This type of malware can be delivered through various methods, such as phishing attacks or malicious apps.
A hacker can gain control of a smartphone to perform remote audio and video surveillance by installing a roving bug on the phone. A roving bug is a software application that can be installed on a mobile device without the user's knowledge, which allows an attacker to activate the phone's microphone and camera and listen in on conversations and capture video footage. The attacker can remotely control the bug, turning it on and off, and even adjust the audio and video settings. This type of attack can be very difficult to detect and can compromise a user's privacy and security.
Theoretically, this could be achieved by cross site scripting, because that is just the method of delivering the payload.
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