I recently did a write up [1] of the Lithuanian vaccine certificate after finding a flaw on it. What impressed me was that the verification was done fully offl

I recently did a write up [1] of the Lithuanian vaccine certificate after finding a flaw on it. What impressed me was that the verification was done fully offline in a privacy preserving way [1] https://tadas.varanauskas.lt/posts/forging-lithuanian-vaccine-certificate https://tadas.varanauskas.lt/posts/forging-lithuanian-vaccin...