Dynamic Pin - Lock ur screen & apps with state of art authenticating algorithm

[vijayr0218]

Dynamic pin app helps you to secure your PIN from shoulder surfing .

When you type in the same PIN every time, there is a good chance for your friends , electronic surveillance or others to know the PIN . How will you avoid that ?

Dynamic Pin changes the pin based on the expression you set in the application. After every use, your Pin is destroyed and only the user who knew the expression can evaluate the new Pin from the clue , the matrix . Deducing the expressions from pin is not a trivial task . An example is provided at the end.

https://www.youtube.com/watch?v=X7xQMIOJ1NM

https://forums.androidcentral.com/e.../details?id=com.mrs.dynamicpin&token=LcqszUSG


Now you can set any expression like a+d , a*f , g-c ...

 

[B. Diddy]

Welcome to Android Central! Interesting concept.

 

[vijayr0218]

If, E = a+b , S = {a , b , c ,d ,e } ,

V1 = { a = 1 , b= 2 , c = 9 , d = 5 , e = 2 } , Password = 3 ;

V2 = { a = 0 , b= 5 , c = 11 , d = 3 , e = 8 } , Password = 5 ;

Possible expressions from first password evaluation are

a+b
d-e
c-d-1
c%6


On cross checking with second password evaluation c-d-1 wipes out but still other expressions are valid. Complexity of deduction depends upon Expression and Values, but better than a static password .

 

[vijayr0218]

Update

Predfined expression list is updated
Recovery options are added.
Installation video added.

https://www.youtube.com/watch?v=tmolzN3mrCo

 

[vijayr0218]

Re: Update

App has been reviewed on this website kindly check out in :
wonderhowto gs4

 

[vijayr0218]

Re: Update

There are two ways to store our encryption details to recover our forgotten expression.


1. Store in an email.

2. Store in external storage.

And we have to select our recovery choice . There are 2 recovery choices,

1. Show expression in Plain text after 3rd consecutive incorrect attempt.

2. Show expression in encrypted text after 3rd consecutive incorrect attempt.

On typing the pin incorrect for 3 consecutive times, based on earlier choice , Expression is displayed.

Decryption procedure :

Let the stored recovery details be
a = VAN
+ = L
b = S
c = J

2. Let the encrypted expression shown be
VAN L S

3. Forgotten expression is obtained by replacing the letters. Here VAN = a , L = + , S = b ,
Then forgotten expression is a + b .

 

[mostappz]

Wow its nice

 

[vijayr0218]

1. Zero matrix issues are fixed .
2 . By default app lock matrices contains only numbers . Click anywhere to show alphabets along.
3. Authorize installation issues fixed .
4. Temporarily two digit numbers feature is removed . It will be back in upcoming releases.
5. Screen lock matrix display time improved .
6 . Battery , performance greatly improved .
7. Blank screen issues are completely fixed.