AutoCAD 2010

[#1]

I've been working on creating a drawing format that can't be editted. I've been able to achieve this by creating a file,  and making it an XREF and making that file read-only. This isn't 100% secure, though. There is nothing here that stops people from either binding the XREF to the drawing or copying and pasting its geometry into the host file. I've come to accept that there may be no way around this, but I was hoping to identify that this has happened with a text field.

Is there any way to make a text field in the file I wish to use as an XREF that reads the file name of that file and would show it in the host file as well? For instance, if I put the a field in the XREF file that reads XXX.dwg, it would read the same way in the host file. My hope is that if I could do this, it would break this link if the file is bound or the data is copied and pasted into the host file.

Is there anyone who knows of a way this could be done? Thanks. 

[#2]

A FIELD would be overkill since you only want to track the one single file's name (and location presumably) correct? A Text lable is all you need.

I'm not sure what level of security this adds: are you hoping to 'see' the text somewhere and have a revelation?

What's to stop someone from simply exploding the FIELD to keep it static?

or erasing it?

If they want to steal your file they will: the only true 'lock' is to buy something like CADLOCK (know it's limitations).

[#3]

It's not so much that I'm concerned someone is going to steal the format. I'm working for an aviation company and the FAA has requirements for drawing format security. I'm basically trying to accomplish something that works as a method to tip us off that the format may have been tampered with. I'm aware that even doing something like that can be worked around, but we're trying to assume that there's no malicious intent here and they're not going to try to cover up their tracks by deleting something that would notify us on the print that the format has been bound to the drawing or copied and pasted into the drawing.

[#4]

A block with a hidden attribute in the file would be an alternative to a FIELD too: if this is truly for tracking, you don;t want to elave it to chance that it gets into your file correctly at your end, you want to specifically has a user input the data.

You don't want to use an object like a FIELD that can suddenly update on it's own outside of your control and introduce more issues.