A Study on a Secure USB Mechanism That Prevents the Exposure of Authentication Information for Smart Human Care Services

Table 7

Functions of the proposed mechanism and related steps.

Function	Detailed function	Related steps
F1 (disk management)	(i) File generation; (ii) File opening; (iii) File closing; (iv) File deletion	(i) Registration process: Steps 5, 6, 7, and 8; (ii) Authentication process: Steps 1 and 8
F2 (user authentication)	(i) ID/PW; (ii) Possible application of additional device authentication to improve security	(i) Registration process: Steps 1, 2, 3, 4, 14, 15, 16, 17, 18, and 19; (ii) Authentication process: Steps 2, 3, 4, 5, 6, and 7
F3 (data protection)	(i) Data encryption/decryption	(i) Registration process: Steps 9, 10, 11, 12, 13, and 19; (ii) Authentication process: Step 7
	(ii) Saving of additional random number and use of hash chain to improve security