A Survey of Worldwide Censorship Techniques
RFC 9505

Received changes through RFC Editor sync (created alias RFC 9505, changed abstract to 'This document describes technical mechanisms employed in network censorship that regimes around the world use for blocking or impairing Internet traffic.  It aims to make designers, implementers, and users of Internet protocols aware of the properties exploited and mechanisms used for censoring end-user access to information.  This document makes no suggestions on individual protocol considerations, and is purely informational, intended as a reference.  This document is a product of the Privacy Enhancement and Assessment Research Group (PEARG) in the IRTF.', changed pages to 34, changed standardization level to Informational, changed state to RFC, added RFC published event at 2023-11-20, changed IRTF state to Published RFC)