General Formula for possible combinations of Android-lock NxN matrix












1














There was a similar Post here for a 3x3 Matrix: android lock password combinations .



I'm not able to figure out a formula to find the possible combinations in general with a NxN matrix.
My Phone for example has the possibility to chose between a 5x5 and a 6x6 Matrix
for my unlock pattern and i would like to know how much more secure the 6x6 is in comparison to 5x5.



Restrictions for the patterns are: Minimum 1 Point, maximum N*N points, no point can be hit 2 times and you can't skip points in diagonal, horizontal and vertical lines from the actual point of your pattern.










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    Hello and welcome to Stack Overflow. In order for someone to answer you, you must provide the code and efforts that you have tried.
    – cmprogram
    Nov 22 at 13:56










  • The question is actually about a general abstract algorithm, so I wouldn't necessarily expect any code yet.
    – Royce Williams
    Nov 22 at 16:35
















1














There was a similar Post here for a 3x3 Matrix: android lock password combinations .



I'm not able to figure out a formula to find the possible combinations in general with a NxN matrix.
My Phone for example has the possibility to chose between a 5x5 and a 6x6 Matrix
for my unlock pattern and i would like to know how much more secure the 6x6 is in comparison to 5x5.



Restrictions for the patterns are: Minimum 1 Point, maximum N*N points, no point can be hit 2 times and you can't skip points in diagonal, horizontal and vertical lines from the actual point of your pattern.










share|improve this question




















  • 1




    Hello and welcome to Stack Overflow. In order for someone to answer you, you must provide the code and efforts that you have tried.
    – cmprogram
    Nov 22 at 13:56










  • The question is actually about a general abstract algorithm, so I wouldn't necessarily expect any code yet.
    – Royce Williams
    Nov 22 at 16:35














1












1








1







There was a similar Post here for a 3x3 Matrix: android lock password combinations .



I'm not able to figure out a formula to find the possible combinations in general with a NxN matrix.
My Phone for example has the possibility to chose between a 5x5 and a 6x6 Matrix
for my unlock pattern and i would like to know how much more secure the 6x6 is in comparison to 5x5.



Restrictions for the patterns are: Minimum 1 Point, maximum N*N points, no point can be hit 2 times and you can't skip points in diagonal, horizontal and vertical lines from the actual point of your pattern.










share|improve this question















There was a similar Post here for a 3x3 Matrix: android lock password combinations .



I'm not able to figure out a formula to find the possible combinations in general with a NxN matrix.
My Phone for example has the possibility to chose between a 5x5 and a 6x6 Matrix
for my unlock pattern and i would like to know how much more secure the 6x6 is in comparison to 5x5.



Restrictions for the patterns are: Minimum 1 Point, maximum N*N points, no point can be hit 2 times and you can't skip points in diagonal, horizontal and vertical lines from the actual point of your pattern.







android matrix passwords combinations combinatorics






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edited Nov 22 at 13:39

























asked Nov 22 at 13:34









Sphingidae

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  • 1




    Hello and welcome to Stack Overflow. In order for someone to answer you, you must provide the code and efforts that you have tried.
    – cmprogram
    Nov 22 at 13:56










  • The question is actually about a general abstract algorithm, so I wouldn't necessarily expect any code yet.
    – Royce Williams
    Nov 22 at 16:35














  • 1




    Hello and welcome to Stack Overflow. In order for someone to answer you, you must provide the code and efforts that you have tried.
    – cmprogram
    Nov 22 at 13:56










  • The question is actually about a general abstract algorithm, so I wouldn't necessarily expect any code yet.
    – Royce Williams
    Nov 22 at 16:35








1




1




Hello and welcome to Stack Overflow. In order for someone to answer you, you must provide the code and efforts that you have tried.
– cmprogram
Nov 22 at 13:56




Hello and welcome to Stack Overflow. In order for someone to answer you, you must provide the code and efforts that you have tried.
– cmprogram
Nov 22 at 13:56












The question is actually about a general abstract algorithm, so I wouldn't necessarily expect any code yet.
– Royce Williams
Nov 22 at 16:35




The question is actually about a general abstract algorithm, so I wouldn't necessarily expect any code yet.
– Royce Williams
Nov 22 at 16:35

















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