This repository comprises a reference implementation (in Python3), and proof-of-concept, of the ImmuneSecure antibody-passport proposal. To generate an example paper-based credential run Generate_QR_Credential.py, to verify run Verify_QR_Credential.py. Credentials, which can be displayed as standard "version 40" QR codes, are signed using ECDSA over brainpoolP512r1 and comprise a user photo, name, a unique Certificate ID (CID) number and a validity period. Credentials are completely self-contained and can be verified offline, without interacting with the signer. Revocation is based on distributing revoked CIDs to verifiers.

Example credential:

Which comprises the following example image (145x170 Greyscale), the name "John Doe", the validity period "16052020-16082020", the CID 0x1fc60e1a4e238ac6cce9d79097a268af and a valid 512-bit ECDSA signature.

Example image:

Dependencies are as follows:

• matplotlib
• opencv-python3
• qrcode 6.1
• zbar