Unicode Security Mechanisms (UTS 39) - Unicode Technical Standard 39
Summary
UTS 39 Unicode Security Mechanisms defines how to detect and mitigate security issues arising from Unicode usage, covering conformance profiles for identifiers, IDN security profiles, confusable detection, and various detection mechanisms. The document discusses data files, migration, and practical guidance for implementing secure string handling in identifiers, emails, and domain names, with updates in version 18.0.0 including new script support and context restrictions for joining controls.