742 ITU‐T's Technical Reports and Specifications Application Services in Smart Sustainable City ‐ Recommendation service Recommendation services, such as concierge service, will be penetrated using data in smart sustainable city. (today‐2020, 2020‐2040, 2040 and beyond) +‐‐‐‐‐‐‐‐‐‐‐‐‐#‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐> Security and Anonymization ‐ Security of smart sustainable city data (today‐2020, 2020‐2040, 2040 and beyond) +‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐#‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐> ‐ Anonymization of smart sustainable city data (today‐2020, 2020‐2040, 2040 and beyond) +‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐#‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐>