Authentication and generation of information for authentication

1. A computer-implemented method, comprising:

selecting, based on one or more features of a user-selected image and as a selected algorithm, one or more of a plurality of feature area detection algorithms based on a shape of one or more feature areas on the user-selected image, wherein each one of the plurality of feature area detection algorithms detects a feature area having a respective shape;

determining a plurality of feature points of the user-selected image using the selected algorithm;

in response to determining the plurality of feature points, detecting a first plurality of interactive operations performed on at least a portion of the plurality of feature points by a user during lock screen passcode set up of a mobile computing device, wherein the first plurality of interactive operations comprise a sliding force for a sliding operation from a first feature point to a second feature point among the plurality of feature points, and wherein the sliding force corresponds to one of a plurality of levels of predetermined sliding forces;

storing the first plurality of interactive operations;

displaying the user-selected image on a lock screen when the mobile computing device is in a locked state;

determining that the plurality of feature points are set to be unmarked on the user-selected image displayed on the lock screen;

in response to determining that the plurality of feature points are set to be unmarked, detecting a second plurality of interactive operations on a touchscreen of the mobile computing device when the mobile computing device is in the locked state and when the plurality of feature points are unmarked on the user-selected image displayed on the lock screen; and

unlocking the mobile computing device when the second plurality of interactive operations match the first plurality of interactive operations, wherein the second plurality of interactive operations match the first plurality of interactive operations when the second plurality of interactive operations are performed on at least a portion of the plurality of feature points with same orders and with same level of sliding force.

2. The computer-implemented method of claim 1 , further comprising receiving an image from a camera of the mobile computing device before determining the plurality of feature points.

3. The computer-implemented method of claim 1 , wherein the plurality of feature points of the image are determined by at least one of the mobile computing device or one or more selections made by the user.

4. The computer-implemented method of claim 1 , wherein the first plurality of interactive operations and the second plurality of interactive operations are at least one of a plurality of strokes that connect at least a portion of the plurality of feature points to form a pattern or a plurality of tapping operations on at least a portion of the plurality of feature points.

5. The computer-implemented method of claim 1 , further comprising determining at least one feature area of the user-selected image and wherein the plurality of feature points are determined from the at least one feature area.

6. A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

selecting, based on one or more features of a user-selected image and as a selected algorithm, one or more of a plurality of feature area detection algorithms based on a shape of one or more feature areas on the user-selected image, wherein each one of the plurality of feature area detection algorithms detects a feature area having a respective shape;

determining a plurality of feature points of the user-selected image using the selected algorithm;

in response to determining the plurality of feature points, detecting a first plurality of interactive operations performed on at least a portion of the plurality of feature points by a user during lock screen passcode set up of a mobile computing device, wherein the first plurality of interactive operations comprise a sliding force for a sliding operation from a first feature point to a second feature point among the plurality of feature points, and wherein the sliding force corresponds to one of a plurality of levels of predetermined sliding forces;

storing the first plurality of interactive operations;

displaying the user-selected image on a lock screen when the mobile computing device is in a locked state;

determining that the plurality of feature points are set to be unmarked on the user-selected image displayed on the lock screen;

in response to determining that the plurality of feature points are set to be unmarked, detecting a second plurality of interactive operations on a touchscreen of the mobile computing device when the mobile computing device is in the locked state and when the plurality of feature points are unmarked on the user-selected image displayed on the lock screen; and

unlocking the mobile computing device when the second plurality of interactive operations match the first plurality of interactive operations, wherein the second plurality of interactive operations match the first plurality of interactive operations when the second plurality of interactive operations are performed on at least a portion of the plurality of feature points with same orders and with same level of sliding force.

7. The non-transitory, computer-readable medium of claim 6 , further comprising receiving an image from a camera of the mobile computing device before determining the plurality of feature points.

8. The non-transitory, computer-readable medium of claim 6 , wherein the plurality of feature points of the image are determined by at least one of the mobile computing device or one or more selections made by the user.

9. The non-transitory, computer-readable medium of claim 6 , wherein the first plurality of interactive operations and the second plurality of interactive operations are at least one of a plurality of strokes that connect at least a portion of the plurality of feature points to form a pattern or a plurality of tapping operations on at least a portion of the plurality of feature points.

10. The non-transitory, computer-readable medium of claim 6 , further comprising determining at least one feature area of the user-selected image and wherein the plurality of feature points are determined from the at least one feature area.

11. A computer-implemented system, comprising:

one or more computers; and

one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, perform one or more operations comprising:

selecting, based on one or more features of a user-selected image and as a selected algorithm, one or more of a plurality of feature area detection algorithms based on a shape of one or more feature areas on the user-selected image, wherein each one of the plurality of feature area detection algorithms detects a feature area having a respective shape;

determining a plurality of feature points of the user-selected image using the selected algorithm;

in response to determining the plurality of feature points, detecting a first plurality of interactive operations performed on at least a portion of the plurality of feature points by a user during lock screen passcode set up of a mobile computing device, wherein the first plurality of interactive operations comprise a sliding force for a sliding operation from a first feature point to a second feature point among the plurality of feature points, and wherein the sliding force corresponds to one of a plurality of levels of predetermined sliding forces;

storing the first plurality of interactive operations;

displaying the user-selected image on a lock screen when the mobile computing device is in a locked state;

determining that the plurality of feature points are set to be unmarked on the user-selected image displayed on the lock screen;

in response to determining that the plurality of feature points are set to be unmarked, detecting a second plurality of interactive operations on a touchscreen of the mobile computing device when the mobile computing device is in the locked state and when the plurality of feature points are unmarked on the user-selected image displayed on the lock screen; and

unlocking the mobile computing device when the second plurality of interactive operations match the first plurality of interactive operations, wherein the second plurality of interactive operations match the first plurality of interactive operations when the second plurality of interactive operations are performed on at least a portion of the plurality of feature points with same orders and with same level of sliding force.

12. The computer-implemented system of claim 11 , further comprising receiving an image from a camera of the mobile computing device before determining the plurality of feature points.

13. The computer-implemented system of claim 11 , wherein the plurality of feature points of the image are determined by at least one of the mobile computing device or one or more selections made by the user.

14. The computer-implemented system of claim 11 , wherein the first plurality of interactive operations and the second plurality of interactive operations are at least one of a plurality of strokes that connect at least a portion of the plurality of feature points to form a pattern or a plurality of tapping operations on at least a portion of the plurality of feature points.