CoviChain: A Blockchain Based COVID-19 Vaccination Passport. (arXiv:2112.01097v4 [cs.CR] UPDATED)

Vaccination passports are being issued by governments around the world in
order to open up their travel and hospitality sectors. Civil liberty
campaigners on the other hand argue that such mandatory instruments encroach
upon our fundamental right to anonymity, freedom of movement, and are a
backdoor to issuing "identity documents" to citizens by their governments. We
present a privacy-preserving framework that uses two-factor authentication to
create a unique identifier that can be used to locate a person's vaccination
record on …

blockchain covid vaccination