“…The theories used in the research on SNS user privacy protection behavior at home and abroad mainly include communication privacy management theory [9], theory of planned behavior [7,14,17,24,25], protection motivation theory [13,18,25], uses and gratifications theory [13], fear appeal theory [4], social capital theory [6], social role theory [6], social cognition theory [26]. The models used include technology acceptance models [17,25]. Communication privacy management theory is to realize privacy protection through the process of personal privacy boundary management, mainly considering factors such as individual differences, context, privacy risks [11]; the theory of planned behavior assumes that behavior intention is the nearest front-end dependent variable of actual behavior, and mainly focuses on factors such as attitude, subjective norms, and perceived behavior control [7]; protection motivation theory is a basic theoretical model widely used and recognized in the theory of fear appeals [4], which believes that there are two cognitive processes when individuals respond to threats: threat assessment and response assessment.…”