Restrict Attachments to read only?

0

Is there a way to set attachments to read only for a certain step?

Reason:
I have a voting application in which several people can vote on the publication of a new file.
The application consists of a main workflow (with a list of the workflow participants) and a sub-workflow for each participant.

After the "Start" step, I want the attachment to be read-only. In both the main workflow and the sub-workflows, it should not be possible to add an attachment, nor remove an existing one.

Are there any ideas here?

Thanks Ernst