Draw-a-Secret is a graphical password. Usually using a graphical password can be easier due to the massive context that it provides.
Graphical passwords can be vary. Selecting objects in a picture, connecting dots, drawing patterns on a background image, and etc. are just a few exmaples.
For more information please read the following article:
This library implements a type of Draw-a-Secret in JS.
In this form a background image will be shown as the context. User can draw a pattern on different parts of the image, or draw a pattern on the image. The interacted positions on the image will be transformed to a string of numbers which can further be hashed. Also it is possible to use it on a combination of images.