How to Encrypt a Shellcode ?

Hi, I'm trying to encrypt a shellcode but I can't. Because a shellcode is a string but not an alphanumeric string. I tried with a XOR cipher but the only thing I get when I print the encrypted shellcode on the CMD is a string of strange characters with a length of 3. I don't know what to do to really encrypt this shellcode. I have encrypted the real shellcode, and got it on the cmd, but I get an error when I try to launch it.

Thanks