What are the new PhD research topic ideas in cloud computing security for a new student?

You can refer to the following RG links:

https://www.researchgate.net/post/Does_anyone_have_any_insight_on_where_to_focus_for_a_PhD_in_Cloud_Security

https://www.researchgate.net/post/can_any_one_suggest_me_the_research_topic_security_in_cloud_computing

https://www.researchgate.net/post/Can_someone_suggest_an_abstract_topic_or_title_for_my_PhD_research_in_Mobile_Cloud_Security

https://www.researchgate.net/post/What_is_the_latest_topic_in_cloud_computing_security

https://www.researchgate.net/post/How_can_I_find_a_research_topic_in_cloud_computing_security_most_likely_private_cloud

https://www.researchgate.net/post/Is_Cloud_computing_security_a_good_research_topic

https://www.researchgate.net/post/What_are_the_unsolved_cloud_computing_security_problems

https://www.researchgate.net/post/Cloud_vs_Security-What_is_you_view

https://www.researchgate.net/post/What_are_new_cloud_security_approaches_and_issues

https://www.researchgate.net/post/What_are_the_recent_security_concerns_in_Cloud_Computing

I think the loss of control by cloud users is the most important security problem in cloud. Someone else is looking after your server and its data, the issue of trust and security by someone  else is a major problem.  By then the cloud providers might have more expertise and experts.

Thank you Han Ping and Samad Kolahi