Critics see China's social credit system (SCS) as a tool of surveillance and repression. Yet opinion surveys in China find considerable public support for the SCS. We explain this puzzle by focusing on citizens' lack of knowledge regarding the repressive nature of digital surveillance in dictatorships, which can be attributed to (1) invisible and targeted repression associated with digital surveillance and (2) government propaganda and censorship further concealing its repressive potential. A field survey experiment on 750 college students in three Chinese regions shows that revealing the SCS's repressive potential significantly reduces support for the system, but emphasizing its social-order-maintenance function does not increase support. Observational evidence from the field survey and a nationwide survey of 2,028 Chinese netizens show that the support is higher if citizens knew about the SCS through state media. Our findings highlight the role of information and framing in shaping public opinion on digital surveillance.W hile digital technologies have made people's lives much more convenient, they provide governments with powerful new tools to intervene in society. By 2018, more than 30 countries (15 autocracies) are deploying digital surveillance tools to monitor, track, and surveil citizens, and this number is rapidly increasing. Among these regimes, China's surveillance state has drawn global attention because of its unprecedented size, sophistication, and international influence-more than 18 countries have adopted China's surveillance technologies as of 2019 (see Polyakova and Meserole 2019). Recently, particular heed is paid to China's social credit system (SCS), a surveillance system that rewards and punishes citizens on the basis of assessments of their "trustworthiness." 1 Although still in its pilot stage, the SCS has collected a large amount of information on citizens' personal, financial, behavioral, and even political conduct to construct their social scores (Wang 2017). Low-score citizens are banned from flights, trains, hotels, good schools, social benefits, government jobs, and so on. Critics raised serious concerns about the SCS's repressive nature, as it has been used to track and punish political activists and human rights lawyers (Gan 2019). 2 Yet, opinion surveys from China find considerable public support for the SCS (Kostka 2019) and for digital surveillance in general (Alsan et al. 2020;Su, Xu, and Cao 2021).Why would citizens in dictatorships support a powerful surveillance tool that could impose substantial political costs on them? The literature on surveillance and state coercion commonly emphasizes the liberty-security trade-off: citizens