Certificate Data (WIP) - Githubissues

Note this is the data for a public exchange certificate, not private / internal.

Current certificate data:

Test centre id (The test centre where the certificate originates)
Test centre signer (Who has validated the test results and has created the certificate in the test centre)
User / certificate id (ethereum address to uniquely identify the certificate and to validate user)
User photo hash (IPFS hash to validate the user physically)
Signature (To validate the data has not been tampered and check the test centre signer)
Guardian(s), if the person has a disability or is a minor a list of people that can be used as user signers.
Testing kit id: Unique identifier of the testing kit, as we have seen some testing kits have proven to give invalid results. (A supply chain link )
Certificate expiry date. We don't know how long the antibodies will last, so continuous check to validate antibodies, studies like this indicates that they can last 3 years on previous coronavirus https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2851497/, although other papers indicate 1 year.
Certficate creation date. This allows to validate against expired signers, test centres, etc. --Extra data thoughts
Certificate token, if linked to a token (like baseline)

Why cannot rely on Zero knowledge proof (at the moment), please correct me if i am wrong

We need to know the test centre to validate the certificate and check the test centre is still valid (bad testing equipment, corruption, bad practices)
We need to know the test batch / kid id to ensure the certificate is still valid
We need to know the guardians list and if him or her is able to provide proof
We need to see a physical representation of the user and match it.
We cannot trust the user to certify himself (hence test centres etc)
We need to check the test centre signer of the certificate is still valid (corruption, bad practices)

Nethereum / Covid19-Immunity-Cert-Attestation