Intrabody　communication　(IBC)　is　a　wireless　communication　technology　using　the　human　body　to　develop　body　area　networks　(BANs)　for　remote　and　ubiquitous　monitoring.　IBC　uses　living　tissues　as　a　transmission　medium,　achieving　power-saving　and　miniaturized　transceivers,　making　communications　more　robust　against　external　interference　and　attacks　on　the　privacy　of　transmitted　data.　Due　to　these　advantages,　IBC　has　been　included　as　a　third　physical　layer　in　the　IEEE　802.15.6　standard　for　wireless　body　area　networks　(WBANs)　designated　as　Human　Body　Communication　(HBC).　Further　research　is　needed　to　compare　both　methods　depending　on　the　characteristics　of　IBC　application.　Challenges　remain　for　an　optimal　deployment　of　IBC　technology,　such　as　the　effect　of　long-term　use　in　the　human　body,　communication　optimization　through　more　realistic　models,　the　influence　of　both　anthropometric　characteristics　and　the　subject＇s　movement　on　the　transmission　performance,　standardization　of　communications,　and　development　of　small-size　and　energy-efficient　prototypes　with　increased　data　rate.　The　purpose　of　this　work　is　to　provide　an　in-depth　overview　of　recent　advances　and　future　challenges　in　human　body/intrabody　communication　for　wireless　communications　and　mobile　computing.