Why Use The Body To Transmit Data?
Sharing information increases the usefulness of personal information devices and provides users with features not possible with independent or isolated devices. However, finding a way to do this effectively, securely and cost-efficiently presented a challenge, at least until PAN was developed.
That's because other likely approaches are not practical for everyday use. For example, wiring all these devices together would be cumbersome and constrictive to the user. Infra-red communications of information, used on TV remote controls, requires direct lines of sight to be effective. Radio frequencies (such as those used with automated car locks) could jam or interfere with each other, or be imprecise in crowded situations.