An electronic mail address used for account registration, communication, or as a login credential. Email addresses are frequently reused across services and can link accounts, reveal real identities, and appear in data breaches. ### Related weaknesses - [[SOWEL-6. Reusing Personal Data]] - [[SOWEL-12. Losing Data to Breaches]] - [[SOWEL-22. Providing Contact Information]] ### Related techniques - [[SOTL-6.1. Check Logins Reuse to Find Another Account]] - [[SOTL-22.1. Check Commits of Source Code]] - [[SOTL-22.2. Check Whois History]] - [[SOTL-15.1. Make Targeted Advertising Campaign]]