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 - Vega Crypto Blueprint Library in Code Plugins - UE Marketplace
LE Encryption - LE Encryption in Code Plugins - UE Marketplace
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.