Symbol selection for swipe based authentication

1. A method comprising:

receiving swipe pattern sensed information from a touchscreen device representative of a user attempting to swipe an authentication pattern to authenticate the user;

displaying a set of multiple different symbols including a user known symbol responsive to the swipe reaching a first known point in the authentication prior to an end of the authentication pattern;

receiving a selection of the user known symbol; and

authenticating the user based on proper selection of the user known symbol and completion of the authentication pattern, wherein completion of the of the authentication pattern follows selection of the user known symbol.

2. The method of claim 1 wherein displaying the set of multiple different symbols comprises randomizing a position of the displayed symbols, wherein the user known symbol is known only to the user.

3. The method of claim 2 wherein the symbols have different shape or color and appear responsive to the swipe pattern sensed information representing a user pausing a predetermined amount of time proximate the first known point.

4. The method of claim 1 and further comprising displaying the set of symbols at a second known point in the authentication pattern, and wherein authenticating the user includes receiving a proper selection a second user known symbol at the second point.

5. The method of claim 1 and further comprising invalidating a swipe responsive to a wrong symbol being selected at the first known point.

6. The method of claim 1 and further comprising invalidating a swipe responsive to the received swipe pattern not matching the authentication pattern.

7. The method of claim 1 and further comprising showing dots on the touchscreen corresponding to the authentication pattern, wherein one of the dots corresponds to the first known point.

8. The method of claim 1 and further comprising:

during a setup period, presenting a set of symbols available for association with the first known point; and

receiving a selection by the user from the set of symbols available, a symbol to associate with the first known point.

9. The method of claim 8 and further comprising receiving a second selection by the user to associate with a second point in the authentication pattern.

10. A machine readable storage device having instructions for execution by a processor of the machine to perform:

receiving swipe pattern sensed information from a touchscreen device representative of a user attempting to swipe an authentication pattern to authenticate the user;

displaying a set of multiple different symbols including a user known symbol when the swipe reaches a first known point in the authentication pattern prior to an end of the authentication pattern;

receiving a selection of the user known symbol; and

authenticating the user based on proper selection of the user known symbol and completion of the authentication pattern, wherein completion of the of the authentication pattern follows receiving selection of the user known symbol.

11. The machine readable storage device of claim 10 wherein displaying the set of multiple different symbols comprises randomizing a position of the known symbol within the displayed symbols.

12. The machine readable storage device of claim 10 wherein the instructions when executed by the processor further perform displaying the set of symbols at a second known point in the authentication pattern.

13. The machine readable storage device of claim 10 wherein the instructions when executed by the processor further perform invalidating a swipe responsive to a wrong symbol being selected at the first known point.

14. The machine readable storage device of claim 10 wherein the instructions when executed by the processor further perform showing dots on the touchscreen corresponding to the authentication pattern, wherein one of the dots corresponds to the first known point.

15. The machine readable storage device of claim 10 wherein the instructions when executed by the processor further perform:

during a setup period, presenting a set of symbols available for association with the first known point; and

receiving a selection by the user from the set of symbols available, a symbol to associate with the first known point.

16. The machine readable storage device of claim 10 wherein the instructions when executed by the processor further perform receiving a second selection by the user to associate with a second known point in the authentication pattern.

17. A device comprising:

a processor; and

a memory device having a program stored thereon for execution by the processor to:

receive swipe pattern sensed information from a touchscreen device representative of a user attempting to swipe an authentication pattern to authenticate the user;

display a set of multiple different symbols including a user known symbol when the swipe reaches a first known point in the authentication pattern prior to an end of the authentication pattern;

receive a selection of the user known symbol; and

authenticate the user based on proper selection of the user known symbol and completion of the authentication pattern, wherein completion of the of the authentication pattern follows selection of the user known symbol.

18. The device of claim 17 wherein the display of the set of multiple different symbols comprises randomizing a position of the known symbol within the displayed symbols.

19. The device of claim 17 wherein the processor further shows dots on the touchscreen corresponding to the authentication pattern, wherein one of the dots corresponds to the first known point.

20. The device of claim 17 wherein the processor further invalidates a swipe responsive to a wrong symbol being selected at the first known point.