The garrote is a simple weapon, but has some drawbacks & is fairly easy to counter if you keep a cool head.
A big problem with being a victim of the garrote is your assassin is behind you. Most people would panic, but it is fairly easy to escape. If you are near a wall, slam your attacker against it hard, this will knock some wind out of them. then kick back with one of your feet right in the groin, causing him to loosen his grip. Now grab the garrote wire & turn the tables. Also, never turn your back on a suspicions foe in the first place.
With this helpful tip you should avoid one of the Ninja's most terrifying weapon.