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Messaging That Even Quantum Computers Can't Break
Adversaries are already executing "harvest now, decrypt later" attacks — capturing encrypted traffic today to decrypt once quantum computers mature. Echo is built for that future, combining classical and post-quantum cryptography so an attacker must break both.
Hybrid PQXDH
X25519 + ML-KEM-768 key agreement with NIST FIPS 203 compliance
Zero-Knowledge
Server stores only encrypted ciphertext and sealed sender envelopes it cannot read
BLE Mesh
Multi-hop Bluetooth forwarding for protests, disasters, and connectivity blackouts
Verifiable Disappearing
Epoch-based key derivation + destruction — cryptographic enforcement, not timers
Case Studies
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