Post Quantum Secure Chat vs Ghostr

Secure messaging for the quantum era. PQC Chat is the first consumer messaging app built with NIST-standardized post-quantum cryptography. While traditional encryption may be vulnerable to future quantum computers, PQC Chat uses ML-KEM-768 and ML-DSA-44 algorithms to ensure your private conversations remain private — today and tomorrow. Why Post-Quantum Security Matters Quantum computers pose a real threat to current encryption standards. Data encrypted today could be stored and decrypted later when quantum computers become powerful enough. PQC Chat protects you against this "harvest now, decrypt later" threat. Key Features • True End-to-End Encryption — Messages are encrypted on your device and can only be read by the intended recipient. Not even we can access your conversations. • NIST-Approved Algorithms — Built with ML-KEM-768 for key exchange and ML-DSA-44 for digital signatures, the same standards adopted by governments worldwide. • Secure Image Sharing — Photos are encrypted before leaving your device, ensuring complete privacy for all shared media. • QR Code Contact Verification — Verify contacts in person by scanning QR codes, preventing man-in-the-middle attacks. • Real-Time Messaging — Instant message delivery with read receipts and typing indicators. • No Phone Number Required — Create an account without sharing personal information. • Cross-Platform — Message friends on any device seamlessly. Privacy by Design - No message content stored on servers - No tracking or analytics - No ads, ever - Open cryptographic standards About Post-Quantum Cryptography PQC Chat implements the Federal Information Processing Standards (FIPS) 203 and 204, published by the National Institute of Standards and Technology (NIST) in August 2024. These represent the gold standard in quantum-resistant cryptography. Protect your conversations for the future. Download PQC Chat today. Terms of Use (EULA): https://pqcnow.com/terms-of-service

Ghostr is an encrypted messenger built around a simple principle: your privacy is not a compromise. No phone number, no email address, no personal information is required to communicate. All messages, calls, photos, videos, and files are protected by end-to-end encryption. No one can read your content — not even us. POST-QUANTUM ENCRYPTION Ghostr uses the most advanced cryptographic protocols available, including ML-KEM-768 standardized by NIST in 2024. Your communications stay protected against current attacks and against future quantum computers. - Triple Ratchet for perfect forward secrecy - PQXDH for post-quantum session establishment - Sealed Sender to minimize metadata exposure to the server - OHTTP routing to separate your IP address from content METADATA MINIMIZATION Most messengers encrypt content but still expose metadata — when you send a message, how often, and to whom. Ghostr adds an extra layer of network privacy on top of end-to-end encryption: - Constant-rate traffic patterns that don't reveal your activity timing - Cover traffic that normalizes overall activity patterns - Adaptive padding to normalize packet sizes - Background polling independent of when you actually send messages NO ACCOUNT REQUIRED Instead of a phone number or email address, Ghostr generates a random identifier locally on your device when you first launch the app. This identifier acts as your contact handle and is not linked to any personal information. You add contacts by scanning a QR code or sharing an invitation link — no directory lookup, no upload of your address book. ROBUST LOCAL LOCK Your device is the last line of defense. Ghostr protects local access with a password derived through Argon2id (OWASP 2025 standard). - Configurable auto-lock (immediate or delayed) - Optional data erase after multiple failed login attempts (the same protection iOS offers natively) - Fully encrypted local storage (SQLite + Argon2id keys) - Forced lock on cold start FEATURES - Real-time encrypted text messages - High-quality encrypted voice calls - Photo, video, and file sharing (encrypted) - Voice messages - Push notifications without revealing content - No ads, no trackers, no behavioral analytics TRANSPARENT SECURITY Ghostr is built on open and publicly auditable protocols. The cryptography relies on well-established libraries audited by the community. No proprietary protocols. No hidden telemetry. WHAT WE DON'T COLLECT We cannot read your messages. We cannot know who you are talking to. We cannot know when you communicate. We cannot access your files. We cannot identify you. These properties follow from the architecture — guaranteed by cryptography and data minimization, not by promises. COMPLIANCE Ghostr complies with the General Data Protection Regulation (GDPR). You can delete your identifier and all associated data at any time from within the app, or simply by uninstalling Ghostr from your device.