It's not the printer that will make the difference; but, the printing process.
The finest detail printing process is gravure.
The most difficult image to reproduce is a hologram.
The most difficult pattern to reproduce is the Euro currency "Eurion" pattern since scanners have been programmed to ignore the pattern.
The most difficult colours to reproduce ...
If you can buy a normal printer that can print this, anyone can.
A "security" measure should be at least expensive to make in a short run. This is if you are a company you could let's say, spend 1000 dollars to print 2000 copies of your "security" paper. It will cost you 50 cents each.
For a random person to try to forge it for one or 10 copies, it will ...