User authentication typical pin-based user authentication involves the user entering his/her numerical pin (along with a userid), using the keyboard, to login into a website. suppose we have two variants of pin-based authentication and assume that all pins have 4 decimal digits. 1. on-screen keyboard display: instead of using a physical keyboard, the website shows an on-screen keypad containing decimal digits 0-9, displayed in a random order. every time the user wants to log in to the website, a keypad pops on the browser screen with a new random order of digits. the user then moves the mouse to select, and click on, the correct digits to enter the pin 2. number lock display: in this case, a display with 4 random decimal digits appear on the screen. the user then adjusts these digits to his/her pin using up, down, left, and right arrow keys on the keyboard. up and down arrow keys are used to change the current digit, and left and right arrow keys are used to move between adjacent digit positions (there are clearly 4 of them). compare these two schemes against the conventional keyboard-based pin entry. identify at least one advantage and one disadvantage of one or both schemes, in terms of usability and security. keep your solution limited to 2 paragraphs (8-10 lines of text total).