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.