Tries and state machines
소아 전담 응급실 갖춰… 고위험 임신부-신생아 진료 거점
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"(1) Provide an accessible interface at account setup that requires an account holder to indicate the birth date, age, or both, of the user of that device for the purpose of providing a signal regarding the user’s age bracket to applications available in a covered application store.
To address these threats, any real-world useful anonymous credential system has to have some mechanism to limit credential duplication. The most basic approach is to provide users with credentials that are limited in some fashion. There are a few different approaches to this:
proceed with caution when applying them to production settings.