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Subject: Re: [cti-stix] Deterministic IDs - pas de deux
On 10.05.2016 18:02:36, Taylor, Marlon wrote: > What enforces the UUIDv4 that "identifies" Object A is not used to > identify Object B? > Hey, Marlon - It's enforced by math. According to Wikipedia [0], the probability of a UUIDv4 collision is approximately 0.00000000006. In other words, "only after generating 1 billion UUIDs every second for the next 100 years, the probability of creating just one duplicate would be about 50%." [0]. Add to that the namespace prefix and the probability of a collision decreases dramatically. [0]: https://en.wikipedia.org/wiki/Universally_unique_identifier#Random_UUID_probability_of_duplicates -- Cheers, Trey -- Trey Darley Senior Security Engineer 4DAA 0A88 34BC 27C9 FD2B A97E D3C6 5C74 0FB7 E430 Soltra | An FS-ISAC & DTCC Company www.soltra.com -- "One size never fits all." --RFC 1925
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