Sawant Yashwant Ramkishan,Kaladgi Mohammed Mujeeb,Kaladgi Ruqiya Nikhat,Jameel Junaid Ahmed,Kaladgi Jameel Ahmed
申请号：
US201514978104
公开号：
US2017177851(A1)
申请日:
2015.12.22
申请国别(地区):
美国
年份:
2017
代理人:
摘要：
A device unlock pattern (“pattern password”) is static in that the same pattern is entered each time to unlock a device. Due to this repetition, a pattern password may be discovered by an application that captures touchscreen gestures, by inspection of fingerprints or smudges on a screen, or simply by an onlooker that views the pattern password being entered. A variable hint pattern can be used to impede discovery. A hint pattern is a sub-pattern (“hint”) of the pattern password to be completed for device unlock. A variable hint pattern can impede discovery by changing the sub-pattern at a defined change threshold related to unlock attempts. The device can randomly change the sub-pattern or randomly change the missing portions of the pattern password at each change threshold. As a result, different inputs complete the pattern password. This variance stymies the methods typically used to discover pattern passwords.
