864 ITU‐T's Technical Reports and Specifications Table G.3 shows in details the indicator for building the \"Net\" and \"DE\" KPIs for smart city. Table G.3 – Indicators for \"Net\" and \"DE\" KPIs KPI Indicator City sscNet 0.3.1 Percentage of buildings covered by fixed broadband (or percentage of city area covered by broadband) 0.3.2 Percentage of city area covered by mobile broadband 0.3.3 Percentage of public offices integrated into the network (sharing data, notification of significant events, consultation, etc.) 0.3.4 Percentage of online administrative services (digital certificates, administrative judicial, etc.) sscDE 0.4.1 Percentage of citizens with Internet access 0.4.2 Percentage of citizens with certified e‐mail 0.4.3 Percentage of citizens with digital signature 0.4.4 Percentage of citizens with computer driving licenses (such as a European computer driving license (ECDL), computer science courses, etc.) 0.4.5 Percentage of citizens who use regularly Internet for purchases, payments, reservations (at least once a month)