With the COVID-19 pandemic entering a second phase and vaccination strategies being applied by countries and governments worldwide, there is an increasing expectation by people to return to a more familiar normal life. There is currently a debate about immunity passports, privacy, and the enablement of individuals to safely enter everyday social life, workplace, and travel. Such digital immunity passports and vaccination certificates should meet people's expectations for privacy while enabling them to present to 3rd party verifiers tamper-evident credentials. This paper provides a comprehensive answer to the technological, ethical and security challenges, by proposing an architecture that provides individuals, employers, government agencies, a digital, decentralized, portable, immutable, non-refutable health status cryptographic proof. It can be used to evaluate the risk of allowing individuals to return to normal work, travel, and public life activities.

翻译：随着COVID-19大流行进入第二阶段,全世界各国和各国政府正在采用疫苗接种战略,人们越来越期望恢复正常生活,目前人们正在辩论豁免护照、隐私和个人安全进入日常生活、工作场所和旅行的能力,这种数字豁免护照和疫苗接种证书应满足人们对隐私的期望,同时使他们能够向第三方核查员提供篡改的明显证书,本文件对技术、道德和安全挑战作出了全面答复,提出一个架构,为个人、雇主、政府机构提供数字、分散、可移动、不可改变、不可反驳的健康状况加密证明,可用于评估允许个人恢复正常工作、旅行和公共生活活动的风险。