Scientists are creating a detector that can smell your pits and tell if you’re a terrorist or just a tired business traveller. One day people’s distinctive body odor, breath, or saliva could serve as an identifier, based on the subtle composite of chemicals that make up a person’s scent or spit. Scientists are poking ever more intimately at the core of each person’s identity right down to the DNA. One day we could see a system based on body odor and saliva that could be used to identify us.”]
Source: https://gizmodo.com/the-next-level-of-security-bo-sensors-115422