{"slug": "whatsapp-is-hiding-phone-numbers-with-usernames-that-same-privacy-idea-applies-a", "title": "WhatsApp is hiding phone numbers with usernames.", "summary": "Suny Choudhary draws a parallel between WhatsApp's username-based privacy and AI prompt sanitization, arguing that developers should strip sensitive identifiers from inputs before sending them to models. The post provides a practical breakdown of how to implement input filtering to protect user data in AI applications.", "body_md": "AI Privacy Starts at Input: What Developers Can Learn from WhatsApp Usernames\nSuny Choudhary\nSuny Choudhary\nSuny Choudhary\nFollow\nJun 30\nAI Privacy Starts at Input: What Developers Can Learn from WhatsApp Usernames\n#\nai\n#\nsecurity\n#\ncybersecurity\n#\nprivacy\n2\nreactions\nAdd Comment\n8 min read", "url": "https://wpnews.pro/news/whatsapp-is-hiding-phone-numbers-with-usernames-that-same-privacy-idea-applies-a", "canonical_source": "https://dev.to/sunychoudhary/whatsapp-is-hiding-phone-numbers-with-usernames-that-same-privacy-idea-applies-to-ai-prompts-3gi3", "published_at": "2026-06-30 11:10:13+00:00", "updated_at": "2026-06-30 11:19:28.077655+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-safety", "ai-ethics", "developer-tools", "natural-language-processing"], "entities": ["WhatsApp", "Suny Choudhary"], "alternates": {"html": "https://wpnews.pro/news/whatsapp-is-hiding-phone-numbers-with-usernames-that-same-privacy-idea-applies-a", "markdown": "https://wpnews.pro/news/whatsapp-is-hiding-phone-numbers-with-usernames-that-same-privacy-idea-applies-a.md", "text": "https://wpnews.pro/news/whatsapp-is-hiding-phone-numbers-with-usernames-that-same-privacy-idea-applies-a.txt", "jsonld": "https://wpnews.pro/news/whatsapp-is-hiding-phone-numbers-with-usernames-that-same-privacy-idea-applies-a.jsonld"}}