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Online censorship has become a common feature in autocracies. Previous work has investigated different online censorship tactics such as website blocking or cyberattacks independently. In reality, however, autocratic governments rely on a  repertoire  of censorship techniques to control online communication, which they are likely to use depending on the respective political situation on the ground. In this article, we study the interplay of different online censorship techniques empirically. Focusing on new Internet measurement techniques and large existing datasets, we study the relationship between  website blocking  and  cyberattacks  (Denial-of-Service). Our results provide evidence that autocrats select tactics from their censorship repertoire depending on the current level of contention. During quiet times, we find some evidence that governments rely on different censorship tactics in parallel. In weeks with protest, however, website blocking is negatively associated with Denial-of-Service attacks against opposition websites. This shows that when the stakes are high, autocrats become more selective in their use of censorship.

Attack or Block? Repertoires of Digital Censorship in Autocracies