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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 sequenceNo. of digitsType
10123456789506928137420XM2VTS
2506928137410Subset
3692813748Subset
46928136Subset
528134Subset
69176328405854026391720Random
7687302159410Random
8532169708Random
92809146Random
1047954Random
  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