Extending the Touchscreen Pattern Lock Mechanism with Duplicated and Temporal Codes
Table 1
Lock codes chosen by test participants and mean unlock times. Node numbering refers to the position in the grid; left to right, top row: 1, 2, 3, middle row: 4, 5, 6, and bottom row 7, 8, 9.
Participant
Lock code (node number)
Number of nodes
Multiselect
Time-select
Mean unlock time (ms)
Unlock time after one hour (ms)
1
5789512355
10
x
x
2458
2422
2
862112686
9
x
x
2193
3
75357
5
x
617
4
965369
6
x
1019
5
3214566987
10
x
2772
6
7856322
7
x
2522
7
74123698755
11
x
x
3079
8
2547856
7
x
2590
2706
9
5236987455
10
x
x
3090
3488
10
14745258563
11
x
2148
2373
11
86248654
8
x
1414
1546
12
775321599
9
x
x
3992
13
3545853
7
x
1420
14
753258
6
x
831
15
6655884
7
x
3362
16
1123357899
10
x
2225
17
1144778
7
x
3385
18
125695
6
x
1739
1488
19
11256988
8
x
3063
20
123558
6
x
1933
21
156248963214789
15
x
2587
2466
22
15987532
8
x
1262
1298
23
744145636965852
15
x
x
4259
3472
24
541258965
9
x
1596
25
147456369
9
x
1374
26
321456987789654
15
x
x
4171
27
369955
6
x
2534
28
8523654
7
x
1526
29
36989
5
x
708
743
30
6588966
7
x
x
2405
31
4585655
7
x
x
1657
32
368414863
9
x
2316
33
1245788
7
x
2399
34
753695147
9
x
1261
35
114123
6
x
x
2475
36
14785589
8
x
x
2407
At second attempt. Failed to unlock after 5 attempts.
