My party is being scryed on by an enemy. We are all low level and don't have access to second level spells yet. Can I get out paper and quill, cast minor illusion around myself as a 5ft cube of hollow stone, and write down sensitive information. Then pass the folded up paper to a party member and cast the illusion around them so they can read it? My theory is that because the scrying sensor is always 10ft away from the target they would just see a block of stone.

From Scrying:

On a failed save, the spell creates an invisible sensor within 10 feet of the target. You can see and hear through the sensor as if you were there. The sensor moves with the target, remaining within 10 feet of it for the duration.

My party is being scryed on by an enemy. We are all low level and don't have access to second level spells yet. 

I want to use paper and quill, to write down sensitive information, then pass the folded up paper to a party member to read it. I want to cast minor illusion around myself as a 5ft cube of hollow stone while writing and around the recipient while reading. My theory is that because the scrying sensor is always 10ft away from the target they would just see a block of stone.

Does this work?

From Scrying:

On a failed save, the spell creates an invisible sensor within 10 feet of the target. You can see and hear through the sensor as if you were there. The sensor moves with the target, remaining within 10 feet of it for the duration.