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Table 1 The digit sequences uttered 8 times, by each individual in qFace

From: Understanding visual lip-based biometric authentication for mobile devices

 

Content of digit sequence

No. of digits

Type

1

01234567895069281374

20

XM2VTS

2

5069281374

10

Subset

3

69281374

8

Subset

4

692813

6

Subset

5

2813

4

Subset

6

91763284058540263917

20

Random

7

6873021594

10

Random

8

53216970

8

Random

9

280914

6

Random

10

4795

4

Random

  1. Sequence 1 is the same 20-digit phrase as XM2VTS, sequences 2–5 are subsets of sequence 1. Sequences 6–10 are random. Sequences 7–10 are not subsets of sequence 6