Aggregate individual's digital footprint
In addition to a target's social media presence may exist a larger digital footprint, such as accounts and credentials on e-commerce sites or usernames and logins for email. An adversary familiar with a target's username can mine to determine the target's larger digital footprint via publicly available sources.  
Detectable by Common Defenses (Yes/No/Partial): No
Explanation: Searching publicly available sources that cannot be monitored by a defender.
Difficulty for the Adversary
Easy for the Adversary (Yes/No): Yes
Explanation: Information readily available through searches
- Christopher Budd. (2016, June 27). The importance of understanding your digital footprint. Retrieved May 4, 2017.
- Christopher Budd. (2015, December 1). Understanding the Risks of the VTech Data Breach. Retrieved May 9, 2017.