https://arstechnica.com/information-technology/2017/10/crypto-failure-cripples-millions-of-high-security-keys-750k-estonian-ids/ https://arstechnica.com/informa

https://arstechnica.com/information-technology/2017/10/crypto-failure-cripples-millions-of-high-security-keys-750k-estonian-ids/ https://arstechnica.com/information-technology/2017/10/crypt... They suspended almost immediately the public key common to the 750 000 flawed cards, disabling them, and they issued an update a few months later. That seems like a pretty good reaction. I don't see what they could have done better, apart from making the cards themselves.