*3.5. Extraction of Appropriate Information*

To analyse the content of the publications, the reviewed publications were classified into categories according to application domains, date of publication, number of citations, publication type, publication venue, affiliation, authors' countries of affiliation, and security aspects covered by the publication. Citation numbers for publications retrieved through online databases were not always accurate, so Google Scholar was used as a cross reference to retrieve the citation numbers. The data extracted was recorded in an Excel spreadsheet to facilitate analysis.
