Soon, I'll be hiking in Spain where, I've been told, that it is often requested/recommended/required to leave my backpack outside of restaurants and other establishments. I will be carrying a length of 550 paracord for a variety of uses, as well as using it to secure my backpack to a pole or bench or table or whatever. All I need to do is make my backpack appear to be more difficult to grab-n-walk-off than the next backpack. Certainly I realize that paracord would be easily cut. If the bad guy has a knife, then all bets are off.
I'm looking for a knot that appears difficult to untie, but in fact is quite easy to tie and untie. I want the knot to give the appearance of security. The appearance that my backpack is securely tied down and to much hassle to bother with. But, in reality, the knot is easily untied when I'm ready to leave and be on my way.
Is there such a knot? What do you suggest?