Demystifying Authentication Concepts in Smartphones: Ways and Types to Secure Access

Table 3

Synopsis of insertable biometrics.

Modalities	Authentication types	Usability pros and cons indicated	Security solutions or concerns reported
Bespoke devices [87, 88]; neodymium magnets [89]; NFC or RFID chips [90, 91]; smart piercings [92, 93]; smart tattoos [93]	Continuous; multimodal; transparent	[94]	Data not available