Its possible to encrypt decrypt variables?

How can I encrypt/decrypt variables in blueprints?.. if its possible of course

There are a couple of solutions on the Marketplace:

Vega Crypto Blueprint Library -
LE Encryption -

You can also add a C++ class and link your own encryption library or create your own encryption system.

Finally you can use simple text manipulation … dependent on what your requirements are. I own both of the above plugins and I have found the Vega one to match my requirements better.