Researchers from the Xi'an Jiaotong-Liverpool University in China have proposed an authentication method for mobile devices that uses semantically linked images as a more secure alternative to alphanumeric passwords.
Their SemanticLock system uses graphical passwords; the user selects from a group of images that relate what he or she considers a meaningful, memorable story; to authenticate, the user would view a group of graphical icons and choose only those that related to the story they have chosen.
In testing personal-identification-number (PIN) and pattern-based authentication techniques, the pattern-based technique was found to have the fastest logins, while PINs had the lowest error rate. However, SemanticLock stories' memorability was determined to be far superior, with only 10% of test participants unable to recall their passwords.
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