Page 702 - Shaping smarter and more sustainable cities - Striving for sustainable development goals

the individuals, it is essential that the data containing sensitive information should be protected
from unauthorized use.

Contrastingly, the organizations should provide the privacy data by transferring the data to useful
services in smart sustainable cities. In providing the data, preserving privacy at a required level
should be prioritized. It has the possibility that the two different data, generated by suitable
anonymization process to the required anonymization level, reveal the original plain data. This
situation can be harmful in publishing data even if the data is appropriately anonymized. Moreover,
the following information is needed from the viewpoint of both original data provider and
application servicer using the data. In providing data as open data, this anonymization process is
indispensable to maximize the use of private data as rich services.

 Contents of data
Services or applications of smart sustainable cities mainly focuses on contents of data. The data can
be separated into two parts: header as an index or tags from the viewpoint of data management
and contents. Contents are the main part of data. For the entity providing an application and its
user, the type of information included is considered important. The valuable application of the data
strongly depends on this information.
 Ownership of data

For the application service provider of the data and its user, the data has to be reliable and used to
address pertinent concerns. Data providers have to give the name of the organization in order to
add value to the data. In short, the way to authorize the owner of the data is another issue for data
services in a smart sustainable city.
 Generation date/time and expiration of data

For the application servicer provider of the data and its user, the date and time for when the data
was generated is valuable information to determine the relevance and freshness of the data. In
some cases, data analysis in its historical trend or changes is achieved. The date when the data was
generated is fundamental information for this analysis. In addition to the information, the expiration
date and time is required. Traffic information and market information can be the examples of data
that the expiration date and time is indispensable.
 Update of the contents

Some data of smart sustainable city requires continuous updating. Instead of static information,
historical information requires to be updated to keep the data fresh. The frequency or interval of
this update may influence evaluability of the data.
 Anonymizer of the data

From the application service provider of the data, and its user, the information regarding who or
which organization anonymized the data is required to know whether the data is trustworthy and
can be used An authorized anonymization servicer provider should anonymize the data for
maximizing the value of the anonymized data. Namely, the way to authorize the anonymization
servicer is another concerning in data services in smart sustainable cities.
 Anonymized date/time of data

The information of anonymized date/time may not be directly concerned with the applications.
However, it is needed from the viewpoint of traceability of data processing. When some privacy
pirating attacks occurs, the information becomes a significant source of its detection and
prevention.

692 ITU‐T's Technical Reports and Specifications