Sdjs-217 [exclusive] Today

| Capability | Description | |------------|-------------| | | A compact JSON‑Schema‑derived language that can be pre‑compiled into binary‑encoded validators for ultra‑low‑power devices. | | End‑to‑end cryptographic binding | Native support for authenticated encryption (AEAD) of both schema definitions and payloads, guaranteeing integrity, authenticity, and confidentiality without extra protocol layers. | | Distributed governance | Decentralised schema registration and version control using a permissioned blockchain ledger, enabling peer‑to‑peer validation without a central authority. |

For organisations seeking a data contract layer that can evolve without service interruption, SDJS‑217 provides a pragmatic yet forward‑looking foundation—one that is already being referenced in emerging IoT‑security standards bodies (IETF WG‑IoTSec, ISO/IEC 30141). Prepared by the OpenIoT‑Consortium Technical Working Group, April 2026. sdjs-217

| Layer | Primitive | Reason | |-------|-----------|--------| | Key derivation | HKDF‑SHA‑256 with node‑specific salt | Guarantees forward secrecy across schema updates. | | Encryption | AES‑GCM‑256 (or ChaCha20‑Poly1305 on 32‑bit CPUs) | Authenticated encryption with minimal overhead. | | Signature | Ed25519 (or ECDSA‑P‑256) | Small public keys (~32 B) and fast verification on MCUs. | | Hashing | BLAKE2b‑256 for schema integrity | Faster than SHA‑2 on most embedded cores. | | For organisations seeking a data contract layer

The early adoption in smart‑grid pilots and industrial robotics demonstrates that SDJS‑217 can , offering a clear migration path for legacy systems: simply register existing JSON‑Schema definitions on the ledger, generate binary validators, and enable the built‑in AEAD envelope. | | Encryption | AES‑GCM‑256 (or ChaCha20‑Poly1305 on