This paper introduces the protocol, a lightweight, entropy-sourced key derivation function (KDF) designed for ultra-secure, air-gapped environments. Unlike traditional KDFs (e.g., PBKDF2, Argon2), which rely on stored salts or predictable inputs, ajdbytjusbv10 exclusive generates session-bound ephemeral keys from a combination of system noise, cache latency jitter, and a user-held mnemonic-derived nonce. The "exclusive" property ensures that no two hardware instances produce the same key material, even with identical inputs. We present security proofs, performance benchmarks on ARM Cortex-M0 and RISC-V architectures, and a reference implementation.