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UUIDv47: Store UUIDv7 in DB, emit UUIDv4 outside (SipHash-masked timestamp)

news.ycombinator.com Unknown 2025-09-21 18:02:29

UUIDv47 - UUIDv7-in / UUIDv4-out (SipHash-masked timestamp) uuidv47 lets you store sortable UUIDv7 in your database while emitting a UUIDv4-looking façade at your API boundary. It does this by XOR-masking only the UUIDv7 timestamp field with a keyed SipHash-2-4 stream tied to the UUID’s own random bits. Header-only C (C89) · zero deps Deterministic, invertible mapping (exact round-trip) RFC-compatible version/variant bits (v7 in DB, v4 on the wire) Key-recovery resistant (SipHash-2-4, 128-b

Topics: key siphash uuid128_t v4 v7
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I went off-grid with this $200 Android phone, and the night vision superpowers came in clutch

zdnet.com Adrian Kingsley-Hughes 2025-11-14 04:53:00

Blackview BV7300 ZDNET's key takeaways This ruggedized smartphone has a huge battery, a massive 800-lumen flashlight, and a night vision camera. The massive battery does make the handset weigh a hefty 2 pounds. The display can be a bit washed out in bright sunlight. View now at Amazon Get more in-depth ZDNET tech coverage: Add us as a preferred Google source on Chrome and Chromium browsers. I remember when smartphones started using the built-in flash as a flashlight -- it was quite revolutio

Topics: battery bv7300 night vision zdnet
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