Help with demo

[skyv195]

Hello, I am trying to "decipher" the Cipher_FMX demo to try to come up with the best way to encrypt/decrypt API Keys. Running the demo, I could see that the best way was using AES256, and HEX output and input, but I am confused on how to create a function on that. Can anyone help to give me the bare skeleton to achieve this? I am using Delphi 12.3 FMX.

I know I have to create an instance like TCipher_AES256 and set some properties, but every try I did, I ran into either UTF8 not present or something is too long to process.

Any help is greatly appreciated.

Sky