How to make memory protection?

Question

Java

I am making a password manager. How in general it is possible to implement protection of the data in memory? I've heard that they do it, but I have no idea what it means. Is it that the type of data encrypted in memory should be stored and decrypted as needed or what?

Answer 1

To defend yourself, you need to understand what, including, for more specifics, to understand reverse engineering yourself.
I have no idea what passwords you will have, and who, why, how will steal them.
I will answer at the most specific level: if this is Android and the RAM memory needs protection, then it is isolated, so that other running applications will not get direct access to it without root rights at all.

Answer 2

Check for a line in /etc/hosts:
If the entry is present, look at the web server logs, it may not start due to an error.