### Explanation Personal characteristics encompass both biometric and non-biometric identifiable traits that individuals may expose online. These characteristics can be broadly categorized into: 1. Physical Biometrics: - Facial features and structure - Voice patterns and speech characteristics - Distinctive marks like tattoos, scars, or birthmarks - Body measurements and proportions 2. Behavioral Biometrics: - Writing style and language patterns - Movement patterns and gestures - Typing rhythm and keyboard dynamics - Social media activity patterns 3. Other Identifiable Characteristics: - Clothing preferences and style - Environmental markers in photos/videos - Recurring objects or backgrounds - Pet appearances and characteristics When shared online, these characteristics can be analyzed using various technical methods, from facial recognition to behavioral pattern analysis, potentially compromising privacy and anonymity. ### Examples - [Fugitive Yakuza Boss Arrested After Facebook Photos of His Tattoos Go Viral](https://gizmodo.com/fugitive-yazuka-boss-arrested-after-facebook-photos-of-1822028945) - [Facial recognition at protests for identifying activists based on public photos](https://www.new-east-archive.org/articles/show/8585/je-suis-maidan-anonymous-russian-website-reveals-protesters-identities) - [Partial Face Recognition](https://github.com/C3n7ral051nt4g3ncy/Facial_Recognition_Special_Forces/tree/master) ### Types - behavioural - technical ### See also - [[SOWEL-3. Creating Content]] ### Typical techniques - [[SOTL-17.1. Conduct Search By Face]]