Glossary and References

BLE GATT. Bluetooth Low Energy Generic Attribute Profile — the application layer over which TaτsuOS receipts are written to a device.

ECDSA. Elliptic Curve Digital Signature Algorithm — the signature scheme TaτsuOS uses, instantiated over the secp256k1 curve.

Feature ID. A bytes32 value, typically keccak256 of a human-readable name (e.g. keccak256("GPS_TRACKING")).

Device ID. A bytes32 value computed from the device's hardware-unique identifier, used to bind a receipt to a specific physical device.

Receipt. A 130-byte signed payload that authorizes a single feature unlock on a single device.

TATSU. The Taτsu Ecosystem's utility token.

TimescaleDB. A time-series-optimized extension of PostgreSQL, used as the cloud's primary store.

Zephyr. A Linux Foundation project — a small, permissively licensed real-time operating system targeting resource-constrained devices.

References

• Taτsu Ecosystem — https://tatsuecosystem.io/
• Zephyr Project — https://zephyrproject.org/
• EIP-191 / EIP-712 signed-message standards — https://eips.ethereum.org/EIPS/eip-712
• OpenZeppelin Contracts v5 — https://docs.openzeppelin.com/contracts/5.x/
• OWASP IoT Top 10 — https://owasp.org/www-project-internet-of-things/
• Bluetooth Core Specification 5.x — Bluetooth SIG