Let me raise a more general issue, based upon the original article.

What is "correct" and not "correct" in copy protection schemes?...

I'll raise a practical example, which I presently have in...

I think that this is a good point - a very good one.

Should you care or not care for permormance, or how the structure of your DB has to be,...

OK.

About "differences between Windows Authentication vs Mixed Mode Authentication when using SQL Server", well, functionally there are none.

Once inside the DB, everything works as advertised.

However, from the User Rights management...