Research Article
Smartwatch-Based Legitimate User Identification for Cloud-Based Secure Services
Table 2
Confusion matrix according to the users using 400 samples per window with accelerometer and gyroscope sensors.
| Users | Accelerometer sensor | Gyroscope sensor | User 1 | User 2 | User 3 | User 4 | User 5 | User 6 | User 1 | User 2 | User 3 | User 4 | User 5 | User 6 |
| DT classifier | User 1 | 1710 | 2 | 6 | 40 | 1 | 42 | 1246 | 1 | 0 | 12 | 3 | 44 | User 2 | 0 | 1796 | 48 | 9 | 35 | 6 | 29 | 1889 | 42 | 1 | 78 | 17 | User 3 | 0 | 40 | 1774 | 31 | 125 | 0 | 1 | 19 | 1772 | 30 | 123 | 15 | User 4 | 12 | 13 | 11 | 1695 | 18 | 45 | 32 | 7 | 19 | 1699 | 7 | 31 | User 5 | 18 | 24 | 40 | 2 | 1457 | 0 | 0 | 21 | 69 | 0 | 1476 | 4 | User 6 | 121 | 16 | 3 | 49 | 1 | 1880 | 140 | 2 | 4 | 30 | 0 | 1895 |
| SVM classifier | User 1 | 1473 | 16 | 27 | 76 | 28 | 135 | 1511 | 32 | 9 | 63 | 1 | 100 | User 2 | 9 | 1597 | 91 | 40 | 84 | 9 | 53 | 1787 | 51 | 10 | 110 | 40 | User 3 | 14 | 165 | 1568 | 51 | 163 | 0 | 18 | 36 | 1576 | 26 | 181 | 20 | User 4 | 26 | 81 | 75 | 1644 | 22 | 68 | 69 | 3 | 37 | 1627 | 1 | 33 | User 5 | 50 | 48 | 134 | 9 | 1346 | 0 | 4 | 39 | 119 | 0 | 1344 | 29 | User 6 | 152 | 0 | 8 | 53 | 16 | 1781 | 185 | 4 | 4 | 69 | 5 | 1862 |
| KNN classifier | User 1 | 1514 | 11 | 15 | 59 | 19 | 113 | 1428 | 13 | 18 | 17 | 0 | 79 | User 2 | 1 | 1679 | 131 | 24 | 132 | 23 | 52 | 1779 | 109 | 29 | 238 | 88 | User 3 | 10 | 113 | 1616 | 12 | 111 | 7 | 0 | 12 | 1638 | 37 | 184 | 36 | User 4 | 41 | 56 | 11 | 1575 | 5 | 83 | 97 | 16 | 27 | 1680 | 8 | 87 | User 5 | 15 | 46 | 89 | 3 | 1332 | 0 | 4 | 37 | 53 | 21 | 1282 | 3 | User 6 | 238 | 13 | 10 | 68 | 7 | 1888 | 183 | 4 | 6 | 43 | 0 | 1749 |
| NB classifier | User 1 | 1008 | 49 | 108 | 178 | 24 | 205 | 593 | 83 | 4 | 12 | 62 | 102 | User 2 | 1 | 1370 | 112 | 35 | 169 | 2 | 79 | 1264 | 28 | 12 | 244 | 68 | User 3 | 40 | 230 | 1069 | 32 | 218 | 35 | 131 | 94 | 974 | 191 | 96 | 44 | User 4 | 221 | 211 | 157 | 1079 | 29 | 127 | 364 | 50 | 561 | 1104 | 601 | 106 | User 5 | 190 | 83 | 350 | 28 | 1472 | 119 | 74 | 177 | 193 | 41 | 611 | 23 | User 6 | 338 | 10 | 58 | 438 | 52 | 1566 | 487 | 202 | 132 | 485 | 82 | 1693 |
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