Sdjs-217 ((install))

"$sdjs": "217", "$id": "sdjs://ledger42#temp‑sensor‑v1", "type": "object", "properties": "ts": "type": "integer", "@binlen": 4 , "temp": "type": "number", "minimum": -40, "maximum": 125 , "status": "type": "string", "enum": ["OK","WARN","FAIL"] , "required": ["ts","temp"]

| Layer | Primitive | Reason | |-------|-----------|--------| | | 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. | sdjs-217

| Target | Timeline | Expected Deliverable | |--------|----------|----------------------| | | Q3 2026 | Optional Huffman‑based dictionary for repetitive field names, reducing average payload to 120 B. | | Edge‑Ledger Integration | Q1 2027 | Light‑weight Merkle‑Tree ledger synchronisation for truly offline‑first devices. | | Zero‑Knowledge Proof Support | Q4 2027 | Ability to prove compliance with a schema without revealing the actual data (e.g., “temperature < 80 °C”). | | AI‑Assisted Schema Generation | Q2 2028 | Toolchain that infers SDJS‑217 schemas from raw sensor streams using federated learning. | | | Hashing | BLAKE2b‑256 for schema integrity

The unique properties of SDJS-217 have led to its adoption in a wide range of applications across various industries. Some of the most significant areas where SDJS-217 has made a substantial impact include: | | Zero‑Knowledge Proof Support | Q4 2027

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– Each new schema triggers a contract that records: