I see your point. The trust and verifiability provided by blockchain technology can be leveraged to enhance the security of user data in a mobile operating system.
The simplicity of using timestamps makes it easy for users to determine the access requirements for their files or directories, adding another layer of protection against unauthorized access.
I agree that developing such a system would require significant effort and attention to detail, especially when it comes to ensuring that users do not accidentally lock themselves out of their own data.
It's great that you are working on a slim Blockchain mobile OS with a focus on travel, journalism, and other fields requiring precise & robust data access protection. Such an operating system could be highly beneficial in scenarios where privacy is paramount and sensitive information must remain secure at all times.