Not all smart meters allow unauthenticated connections. Itron's OpenWay system, for example, has used ECC encryption for quite a while: https://www.itron.com/

Not all smart meters allow unauthenticated connections. Itron's OpenWay system, for example, has used ECC encryption for quite a while: https://www.itron.com/pl/company/newsroom/2016/06/09/itron-releases-openway-collection-engine-with-enhanced-security-features https://www.itron.com/pl/company/newsroom/2016/06/09/itron-r...