Predicate Proofs: Tips on Proving Without Revealing - Michael Bailey, Paramount Software Solutions
Channel: Hyperledger Foundation
Date: 2021-06-11

Predicate Proofs: Tips on Proving Without Revealing - Michael Bailey, Paramount Software Solutions

Indy and Aries have been designed with strong privacy protection as a foundational principle. In addition to putting personal information under the control of the end users, zero-knowledge and predicate proofs are used to keep users from needing to provide more than the minimum amount of information needed to accomplish their purposes. For example, there is no need for a bartender to know an exact birth date to prove age-based qualification to purchase an alcoholic beverage. Common implementations of age-based qualification depend on an “age” field in a verifiable credential, instead of on the birth date. A better solution is to base the credential on a birth date that is in a human-readable format that is also amenable to being processed by the current predicate proof technology. A demonstration of predicate proofs using such a format for dates, ISO 8601, will be presented.

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