Security comes in many forms, but one of the most useful are devices which can be kept on your person at all times.
You have a number of options when it comes to these devices, but most of them focus upon enhancing women’s security. You will find that they will usually be a means to alert other people in the area of a problem, such as a sound device, but some are more aggressive in nature, and will cause harm. This complicates matters though, as that requires greater regulation, and you’ll find that what may be legal in one country could well be illegal in another.
Stun-guns are another favourite item for people around the world. Releasing a non lethal charge (usually) into the offending assaulter, when brought into contact with them and activated, it will typically paralyse movement in the victim for a period of time; enough for the original victim to either escape harm or further restrain the person stunned.