Presenting personal information in the form of a QR code has become a daily reality for many during the Covid pandemic: in Quebec, people showed their immunization information using the government-issued VaxiCode, a SMART Health Card (SHC) credential that follows a medical standard adopted in Canada and in many other countries. The paradigm of presenting information about oneself can easily be generalized beyond this health scenario. In this presentation, I’ll first give an overview of the SHC framework, focusing on its security features and describing its deployment in Canada. I’ll then present a generic framework to issue QR codes that can encode attributes of any type. I’ll introduce a strong privacy feature allowing users to only disclose a subset of the encoded attributes, addressing one of the main privacy critiques of SHCs. Finally, I’ll give a demonstration and describe the open-source specification and reference implementation for this generic framework.