What encryption methods are you using?

Question

PHP

If you need to encrypt messages and other textual information.
What methods would you use?

Answer 1

I have MCRYPT_RIJNDAEL_256 and MCRYPT_blowfish in different places.
But, to be honest, I don’t remember why these particular algorithms.
In any case, I would use mcrypt.

Answer 2

md5 in this case is not suitable right?

Answer 3

Here is a simple solution. If no one sees the code of the "encoder" :), then the lines will look like gibberish. Of course, an experienced hacker will recognize the trick, but for this the mind needs a stimulus.
function mega_encode($str) {
$ret="";
for($i=0;$i