Privacy-first verification built on Verifiable Minimal Disclosure (VMD).

Applicert is focused on a simple idea:

Verifiers should be able to ask questions of data — and receive minimal, verifiable answers — without exposing the underlying information.

This work introduces and explores a model called Verifiable Minimal Disclosure (VMD).

Verifiable Minimal Disclosure (VMD) is a model in which systems answer narrowly scoped questions by returning the smallest possible, verifiable result — without exposing underlying data.

In practice, VMD systems function as:

policy-enforced, query-responsive verification systems

Key characteristics:

• Data remains under user control
• Verifiers submit constrained, question-based queries
• Responses are minimized (e.g. true/false, not raw data)
• Interactions are governed by policy, consent, and audit

This enables:

• Privacy-preserving verification
• Reduced data exposure and storage liability
• Stronger alignment with real-world regulatory requirements

The first public reference implementation is now available:

👉 VMD Core Engine (v0.1 pre-release)
https://github.com/applicert/vmd-core-engine

Includes:

• Core engine execution pipeline
• Query validation and replay protection
• Consent state machine
• Response minimization layer
• Audit logging (hash-chained)
• AgePass example profile and demo

Most current systems require sharing full datasets to prove simple claims.

VMD demonstrates an alternative:

• Ask only what you need
• Reveal only what is necessary
• Prove the result

This is early-stage work:

• v0.1 is a reference implementation, not production-ready
• Cryptographic proofs are currently stubbed
• The focus is on validating the interaction model and architecture

This work is being shared for review and discussion.

If you have experience in:

• Verifiable Credentials (W3C)
• Decentralized Identity (DID)
• Cryptography / ZK systems
• Privacy-preserving architectures

Your feedback is especially valuable.

The VMD model and associated materials are released under CC0 (public domain dedication).

Attribution is not required, but appreciated:

"Verifiable Minimal Disclosure (VMD), William Brian Williams / Applicert, 2026"

Code in this organization is licensed under the Apache License 2.0 unless otherwise noted.