Method and system for private identity verification

A method comprising:

• obtaining a plurality of cryptographically secure blockchain events that are generated with respective private identifiers including a first event that is generated using a first private identifier associated with a first user;
• receiving, from an identity verification system, initial zero-knowledge proof messages including the first event;
• sending, to the identity verification system, the respective private identifiers;
• receiving, from the identity verification system:
• a zero-knowledge proof response generated using a zero-knowledge proof challenge;
• and
• proof that the first private identifier used in the initial zero-knowledge proof messages is included in the respective private identifiers;
• and
• verifying that the first private identifier used in the initial zero-knowledge proof messages is included in the respective private identifiers.

A system comprising:

• a processor;
• a network interface communicatively coupled to the processor;
• and
• non-volatile storage communicatively coupled to the processor and having stored thereon computer program code that is executable by the processor and that, when executed by the processor, causes the processor to perform a method comprising:
• obtaining a plurality of cryptographically secure blockchain events that are generated with respective private identifiers including a first event that is generated using a first private identifier associated with a first user;
• receiving, from an identity verification system, initial zero-knowledge proof messages including the first event;
• sending, to the identity verification system, the respective private identifiers;
• receiving, from the identity verification system:
• a zero-knowledge proof response generated using a zero-knowledge proof challenge;
• and
• proof that the first private identifier used in the initial zero-knowledge proof messages is included in the respective private identifiers;
• and
• verifying that the first private identifier used in the initial zero-knowledge proof messages is included in the respective private identifiers.

A non-transitory computer readable medium having stored thereon computer program code that is executable by a processor and that, when executed by the processor, causes the processor to perform a method comprising:

• obtaining a plurality of cryptographically secure blockchain events that are generated with respective private identifiers including a first event that is generated using a first private identifier associated with a first user;
• receiving, from an identity verification system, initial zero-knowledge proof messages including the first event;
• sending, to the identity verification system, the respective private identifiers;
• receiving, from the identity verification system:
• a zero-knowledge proof response generated using a zero-knowledge proof challenge;
• and
• proof that the first private identifier used in the initial zero-knowledge proof messages is included in the respective private identifiers;
• and
• verifying that the first private identifier used in the initial zero-knowledge proof messages is included in the respective private identifiers.