I'm using WordPress for a website project where there're some requirements about privacy respect. Thus, I would to encrypt my data user using a AES algorithm. As I'm developing a custom plugin, I have no problem to encrypt my user's sensitive data, because I provide the page that contains the registration for. But the problem is when it comes to display and modifiy these information in the core WordPress' backend. I couldn't find out where and how I could do that... I've looked for this information in the Internet for hours without being able to find it.
I've found this page https://code.google.com/p/wordpress-aes/ where a guy has developed a repo on Google Code, doing (almost) the stuff I want to do, and he tells that he sent a mail to people at WordPress for merging his code into WordPess' core. As that guy did not do a plugin or whatever, it lets me think that it's not possible to modify the reads and writes done from and to the database, from the backend...
Could some one help me about this issue?
Thanks in advance.