Join research without handing over your chart.

Answer a study’s criteria with a zero-knowledge proof. Your record stays in your own vault.

Try the demo How a proof works

One record, two sidesStudy: Home blood pressure and glucose control

Your view / What the lab sees
	Your view	What the lab sees
Age	52	40–70Sealed
Diagnosis	Type 2 diabetes, 2019	Type 2 diabetesSealed
HbA1c	7.1 %	6.5–9.0 %Sealed
Blood pressure	138/86	Systolic ≥ 130Sealed
Medications	Metformin, amlodipine	Not askedSealed

Proof verified0x9c4e…a71bRevealed to the lab: eligible.

Today, your data is either locked away or given away.

The usual way

Your chart, emailed as a PDF
A screener with your name and diagnoses
No way to take it back

With Cura

Public criteria, nothing else asked
A proof leaves your device, not a file
Revoke with one signature

How a match happens

Read the full mechanics

Seal your records
Import records into a vault only your key opens.
A study posts its criteria
Age 40–70, type 2 diabetes, HbA1c 6.5–9.
Your device proves the match
The check runs locally. Only the proof leaves.
You sign a consent slip
Fields, end date and reward. Revocable any time.

A woman at her kitchen table with a cup of coffee, in morning light

For patients

Help research on your terms.

No screener forms
Field-by-field consent
Rewards you claim yourself

Try it as a patient

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For research teams

Recruit a verified cohort, not a data liability.

Live cohort estimates
No raw records to secure
Every consent on the record

Try it as a lab

An older man with white hair sitting by a bright window at home

For contributors

The people in the data set the rules.

One member, one anonymous vote
Minimum cohort: 10 people
Longest consent: 12 months

See the council

Questions

See both sides of the glass.