I have to keep it VERY simple because encrypting a message is very tedious especially finding variable values (that needs to be prime and what not). But even if simple, I hope you figure out the message! Good luck!
The secret message is:
ca4hMZZRIQYiJgQGYXcR
The hints:
1. The message is reversed.
2. The message is converted to a specific decimal value.
3. This value is squared.
4. The encypted message is then converted to another value What value? I don't want to make things too simple.
Good luck! And if you NEED more hints Iet me know