A Rhythm-Based Authentication Scheme for Smart Media Devices

Table 4

Three types of the standard key based on key length.

Type	Rhythm locking pattern	Locking pattern characteristics
Key 1	85/1:10/0:5/2:10/0:5/3:10/0:5/2:10/0:5/3:10/0:5/4:10	(i) Short length; (ii) Six single notes; (iii) Simple rhythm
Key 2	158/3:20/0:3/2:20/0:3/5:20/0:3/2:20/0:3/3:20/0:3/5:20/0:3/2:20	(i) Medium length; (ii) Two composite notes; (iii) Six single notes; (iv) Simple rhythm
Key 3	220/1:50/0:5/5:10/0:5/2:40/0:15/3:30/0:5/a:60	(i) Long length; (ii) Two composite notes; (iii) Three single notes; (iv) Irregular rhythm