UUIDv47 Library: Combining UUIDv7 Sortable Performance with UUIDv4 Privacy
By
aabbdev
Sesame, salt, and substance. A flagship bake.
Summary
UUIDv47 is a C library that transforms UUIDv7 (time-sortable UUIDs) into UUIDv4-like identifiers for API boundaries while maintaining the sortable properties internally. It uses SipHash-2-4 encryption to mask the timestamp field with a key derived from the UUID's random bits, providing both the performance benefits of UUIDv7 sorting and the privacy/security appearance of UUIDv4.
Key quotes
· 3 pulleduuidv47 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
UUIDv47 = v4 privacy + v7 performance
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