## 1 Introduction
The data reveals distinct patterns of public interest in these subjects, reflecting the broader societal trends and technological developments. Cybersecurity shows a gradual increase in interest over time, with a more pronounced upward trend starting around 2013. This steady growth likely reflects the increasing digitization of society and the consequent rise in cyber threats, prompting greater awareness and concern about digital security measures. Data privacy maintains a relatively low but consistent level of interest throughout the period. This stability suggests an ongoing, baseline level of concern about personal data protection among internet users. The lack of significant spikes may indicate that data privacy has become a persistent rather than episodic concern in the public consciousness, probably consolidated by the implementation of the GDPR in 2018. Blockchain exhibits the most dramatic fluctuations. It remains relatively unknown until around 2017, when it experiences a meteoric rise in interest, peaking sharply in late 2017 to early 2018. This spike coincides with the cryptocurrency boom ([PERSON] in [1]), particularly the Bitcoin frenzy. Following this peak, the interest in blockchain has been volatile but generally higher than the pre-2017 levels, suggesting its enduring relevance in technological discourse ([PERSON], [PERSON], and [PERSON] in [2]). The chart in Figure 3 from Google Trends illustrates the evolution of search interest concerning privacy in five privacy-related terms from 2004 to 2024: \"internet privacy\", \"data privacy\", \"digital privacy\", \"information privacy\", and \"online privacy\". The visualization reveals shifting public concerns and awareness about privacy in the digital age. Figure 1: Number of published articles for each year since 2015, on different topics and in total, extracted from the Web of Science database on 13 July 2024 (the values for 2024 were predicted through approximation by doubling the number of existing articles until 13 July; the total number of published articles (derived from searching “the” as a keyword) is divided by 100 in order to fit the graph. Figure 2: Interest over time in the four selected topics, measured through Google Search. Source: Google Trends, 13 July 2024. \"Internet privacy\" shows the highest initial interest in 2004, likely reflecting the early concerns about online safety as internet usage became widespread. However, this term experiences a steady decline over time, suggesting a shift in how people conceptualize privacy issues. A notable spike in \"internet privacy\" searches occurs in early 2017, possibly linked to the US Congress voting to allow internet service providers to sell users' browsing data. This event may have momentarily rekindled interest in the broader concept of internet privacy. \"Data privacy\" emerges as the dominant term by the end of the period, showing a marked increase in interest from around 2017 onwards. This surge likely corresponds to high-profile data breaches, the implementation of GDPR in 2018, and the growing awareness of how companies collect and use personal data. The terms \"digital privacy\", \"information privacy\", and \"online privacy\" maintain relatively consistent, lower levels of interest throughout the period. Their stability suggests these concepts have become part of the broader privacy discourse without dominating public attention. The overall trend indicates a shift from general concerns about \"internet privacy\" to more specific worries about \"data privacy\". This change reflects the evolving digital landscape, where data have become a valuable commodity and their protection a significant societal issue. The rising prominence of \"data privacy\" searches also suggests increased public awareness of the implications of personal information management in the digital era.