I found this interesting because it is related to our assignment of “reconnasaince”. The article states the vulnerabilities of public share of google calendars. Avinash Jain, a security researcher from India said that it is convenient for organizations to share public calendars; however, these contain plenty of sensitive information such as event names, event details, location, or even meeting links which anyone can use Google search hacking query to gain this public information. In addition, hackers will use phishing technique in order to send a fake invitation link via google calendar to steal private information.
Source: https://thehackernews.com/2019/09/google-calendar-search.html