PersonaGuard

PersonaGuard: Social Identity Continuity Scanner Detect when a real account may no longer be acting like the real person. PersonaGuard is a local-first Chrome and Edge extension designed to help identify suspicious behavioral changes in social conversations. Instead of relying only on SPF, phishing lists, or domain reputation, PersonaGuard focuses on identity continuity: - writing style drift - vocabulary changes - emotional tone shifts - urgency and payment pressure - platform migration attempts - secrecy and credential requests How it works: 1. Capture older known-good messages from a real contact. 2. PersonaGuard builds a local writing fingerprint. 3. Scan newer suspicious conversations. 4. Compare: - sentence structure - vocabulary overlap - punctuation habits - repeated phrases - emotional indicators - behavioral risk signals PersonaGuard provides: - Identity Continuity Risk Score - Writing Drift Score - Behavioral Signal Detection - URL continuity and cloned-profile pattern checks - Recommended Actions Privacy First: - No automatic scanning - No continuous background monitoring - No external PersonaGuard servers - User-triggered scans only - Data stored locally using chrome.storage.local until the user deletes it - Optional Chrome built-in AI explanation only when supported on-device by the browser Behavioral Signals Detected: - Platform migration (Discord, Telegram, Signal, WhatsApp) - Payment and crypto requests - Urgency pressure - Trust acceleration - Authority mimicry - Secrecy requests - Credential/document risk PersonaGuard does not claim an account is fake. It highlights continuity risk and recommends verification steps before trust, payment, or document sharing.