We present a protocol for establishing a shared one-time pad between two devices without physical contact, using X25519 Elliptic Curve Diffie-Hellman key exchange over an ARK Station Network rendezvous node. The protocol eliminates the classical OTP bootstrap problem by deriving pad material deterministically from a shared ECDH secret via HKDF and AES-CTR. Device identity is anchored to each device's HNBP-CORE hash chain, providing a tamper-evident audit record of every pairing event. The full pairing exchange completes in under 60 seconds, requires no accounts, no PKI infrastructure, and no trusted third party beyond the rendezvous node. A six-digit pair code derived from SHA-256 of the initiator's ephemeral public key coordinates the rendezvous. A confirmed live test was conducted May 5, 2026 on two real devices: plaintext 'luke5:4' was dispatched from macOS, transmitted as NS2.0 envelopes via a local ARK Station node, and decoded correctly on Android with no prior physical contact between devices.
AriaLabs Systems LLC (Tue,) studied this question.
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