Which of the following is NOT a privacy protection technique?

Public Wi-Fi sharing is not a privacy protection technique. While it can enable convenient access to the internet, it often exposes users to significant security risks. When utilizing public Wi-Fi, data transmitted over the network can be intercepted by malicious actors, leading to potential breaches of personal information. This lack of security is particularly concerning for sensitive transactions and communications.

In contrast, antivirus software serves as a defense mechanism against malware, protecting a user's device from harmful software that can invade their privacy or steal data. Running a VPN (Virtual Private Network) encrypts internet traffic, ensuring that communications remain private and secure from eavesdroppers. Monitoring credit activity helps individuals track their financial information and identify any unauthorized transactions or identity theft, thus enhancing personal security. Together, these options are focused on safeguarding personal information, whereas public Wi-Fi sharing does not provide protection and can actually compromise privacy.