Backup disk image isn't encrypted
I'm backing up my hard drive into a disk image on another drive, using SuperDuper. I thought I had set it to be an encrypted image, but it doesn't seem to be. I can open it in the Finder by just clicking on it. It also mounts if I launch SuperDuper, again without entering a password.
I checked Keychain and it doesn't seem to have stored a password, so apparently there's no password protection.
Can I change this one so it's encryted and password-protected, or do I just have to start over and make a new image?
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