" Rather, I'm responding as to why God 'cloaked' (encrypted) this message."
So God went through the trouble of inspiring the writing an infallible collection of books - the bible - but made sure it's written in a cryptic way that no human can perfectly understand or interpret all of it correctly? What then is the value of it being infallible if no human can benefit from its infallibility by virtue of the fact that no human can perfectly understand all of it? That is not the mark of divine wisdom at all!
Your God is like a song-writer who goes through the trouble of writing the most beautiful song and musical composition - in a way that no one can fully understand all of it so as to render it perfectly. So the most beautiful song will never be heard despite all meticulous effort that went into creating it. Isn't that a waste? Isn't that foolish?
I think its more reasonable to believe that the books of the bible were written by imperfect men of long ago and not an all wise God. An all wise God would have not a much better job. This claim that God 'cloaked' or encrypted his message is nothing but a convenient and false excuse to explain away the poor authorship that makes it difficult to understand it all fully.