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

news.ycombinator.com Unknown 2025-09-24 06:02:29

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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Roku and Aurzen Unveil First Projector With Roku Built-In

cnet.com See Full Bio 2025-09-26 23:00:05

Roku and Aurzen have premiered the Aurzen Roku TV Smart Projector D1R Cube, a mouthful of a name for a diminutive projector, for "under $200." This is the first projector to use Roku OS as its built-in streaming interface while the majority of projectors on the market now use Google TV as their interface. The D1R Cube is a budget projector with a claimed 330 lumens and 1080p resolution. Also read: Best Projectors for 2025 "Cube" You don't need to point the remote at the screen. Roku The D1R

Topics: cube d1r projector roku tv
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Baseus’ solar-powered dash cam keeps an eye on your parked car for up to two weeks

theverge.com Andrew Liszewski 2025-10-02 19:01:09

is a senior reporter who’s been covering and reviewing the latest gadgets and tech since 2006, but has loved all things electronic since he was a kid. Baseus has announced a new dash cam that can continue capturing incidents even while your vehicle is turned off. The PrimeTrip VD1 Pro includes both a rechargeable battery and a high-efficiency solar panel it uses to record incidents when motion or impacts are detected for up to 14 days while your car is parked, without draining your vehicle’s ba

Topics: baseus battery pro vd1 vehicle
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This palm-recognizing smart lock left me wondering how I lived so long without it

zdnet.com Maria Diaz 2025-11-24 00:30:17

TCL D1 Pro ZDNET's key takeaways The TCL D1 Pro smart lock is available for $170. This smart lock features some of the most reliable and fastest palm recognition technology I've tested, and it has a rechargeable battery instead of the standard replaceable batteries. The TCL D1 Pro's biggest downfall is the app, which is not user-friendly for customizing settings and feels outdated. $125.98 at Amazon Palm vein recognition is becoming quite popular among smart lock manufacturers, and the TCL D1

Topics: d1 lock palm smart tcl
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Scientists Succeed in Reversing Parkinson’s Symptoms in Mice

wired.com Fernanda González 2026-01-28 05:30:00

Cases of Parkinson’s disease have doubled in the last 25 years, according to figures from the World Health Organization. For decades, the scientists have investigated what triggers this disorder to mitigate its symptoms and anticipate its onset. Now, a series of experimental therapies are laying the groundwork for potentially reversing the condition, which affects nearly 10 million people worldwide and can generate costs of approximately $10,000 per patient per year, when considering direct and

Topics: brain copper mice parkinson sod1
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