A unique handle or nickname used to identify an account on a platform, distinct from a person's real name. Usernames are often reused across platforms, making them a valuable pivot point for linking accounts to a single individual. ### Related weaknesses - [[SOWEL-8. Using Nicknames]] - [[SOWEL-6. Reusing Personal Data]] ### Related techniques - [[SOTL-6.2. Check Nicknames Reuse to Find Another Account]] - [[SOTL-8.1. Check Pseudonyms]] - [[SOTL-2.1. Search for Alternative Account on the Same Platform]] - [[SOTL-2.2. Search for Accounts on Other Platforms]]