UUIDv47: Store UUIDv7 in DB, emit UUIDv4 outside (SipHash-masked timestamp)
7 hours ago
- #Database
- #UUID
- #Security
- uuidv47 allows storing sortable UUIDv7 in databases while presenting a UUIDv4-like façade at API boundaries.
- Uses XOR-masking on the UUIDv7 timestamp field with a keyed SipHash-2-4 stream tied to the UUID’s random bits.
- Features include header-only C (C89), zero dependencies, deterministic and invertible mapping, and RFC-compatible version/variant bits.
- Provides key-recovery resistance using SipHash-2-4 with a 128-bit key.
- Includes full tests, quick start guide, public API details, and comprehensive documentation.
- UUIDv7 is time-ordered, improving index locality and pagination.
- The façade hides timing patterns, making it appear as UUIDv4 to clients/systems.
- Uses SipHash-2-4 for security, ensuring the key does not leak.
- Includes build, test, and coverage instructions, along with integration tips and performance notes.
- FAQ addresses common questions about security and indistinguishability from UUIDv4.
- Licensed under MIT.