[codezero]

I just think its unlikely that an alien message would be coded. Our own messages sent with intent to space are not just unenciphered, they include a lot of meta data to make finding the patterns required to understand it easier.

If instead we used a one time pad, we wouldn't have much luck reaching out to aliens. This points to the more likely scenario that the manuscript isn't encoded at all (gibberish) or it was meant to be understood by only one person.