With the recent advancement in information and communication technology and the Internet of Things, Wireless Body Area Networks garnered huge attention among the research community. Various sensors sense real-time data based on human medical indicators, which are then shared with physicians and families to prevent accidents and disasters. Security communicating data over an open network or the internet is another challenge in this domain. Privacy and authentication could avoid such data breaches. The purpose of the study is to examine the research that has been conducted thus far in the area of security and the discoveries in adjacent fields by pointing out problems and difficulties, defects in the methodology, and how they were resolved. As the demand for WBAN devices and networks is growing in the field of smart and autonomous healthcare, the recent research trends and future scopes are highlighted so that society can be facilitated in a better way.