Security with Flat files

Hi,

I have a webpage with many UI Elemnts such as LinkToURLs, TextViews whose content is got from flat files present in the src/mimes folder of the project.

I need to keep the files secure so that no other person can change the details present in it.

Please help me how to proceed as i dont have any idea rearding this.

Thanks and Regards,

Padma Usha.