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Journal: Symmetry, 2019
Volume: 11
Number: 1087
Article:
Preventing Shoulder-Surfing Attacks using Digraph Substitution Rules and Pass-Image Output Feedback
Authors:
by
Lip Yee Por, Chin Soon Ku and Tan Fong Ang
Link:
https://www.mdpi.com/2073-8994/11/9/1087
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