External identity is the collection of personal data about executives, employees, and their families that can be found outside company systems. This includes phone numbers, home addresses, family links, social media profiles, public records, and data-broker listings. Because the information is already exposed in public or semi-public sources, attackers can build a target profile without breaching a network.
In cyber security, external identity matters because it supports reconnaissance and makes follow-up attacks more convincing. Threat actors use it to tailor phishing, impersonation, account recovery abuse, harassment, and other social engineering attempts. Defenses focus on reducing the exposed footprint: finding where sensitive personal data appears, requesting removal or suppression when possible, and monitoring for reappearance. This is often called digital executive protection, and it complements IAM, email security, endpoint controls, and user awareness. The goal is simple: deny attackers the personal context they need to turn open-source information into a believable attack.