1. Neural Network Typing Authentication
TJ STAR
Luke Knepper

2. The Dilemma Passwords can sometimes be suboptimal
Advanced biometrics are expensive
Need an alternative

3. A Solution Authenticate people by how they type
Typing patterns differ by person  user’s specific typing characteristics will be used for authentication
Cheap and flexible to implement

5. Background
Measures users' typing patterns, compares to a previous standard
Technique first used in WWII
Works with ~90% Accuracy
Effectively implemented in a neural network structure

6. Background

7. Development (front-end)
On account set-up, user types large amounts of text
On subsequent log-ins, user types smaller amount of text
Username and password are still needed

8. Development (back-end)
Set-up data is used to train a neural network
The node weights are tweaked thousands of times to train the neural network to output the desired result
Log-in data will be fed through neural network: result either meets threshold (admitted) or does not meet (rejected)

9. Experimentation Step 1:
Collected lots of test typing data via an online applet

10. Experimentation Step 2:
Use this data to test the accuracy of the neural network approach:
Train a neural network for each data file collected, run every other file through that neural network, record how many breach

11. Experimentation Step 3:
Tweak the neural network set-up and repeat step 2 to find the optimal neural network

12. Increased exposure (25 → 50)
Results
Network Type
Mean Training Time
% Breached
(threshold of .007)
Base Network
1.1 s
90.5%
Increased exposure (25 → 50)
2.3 s
90.7%
Increased Cycles (1000 → 2000)
2.7 s
90.9%
Increasing Layers (1 → 3)
3.1 s
Increasing All
7.5 s

13. Another Advantage
What if another person jumps on the computer while you are logged in?
Can continuously monitor the user's typing patterns during program use
If a change is detected, system suspects an intruder and locks the user out

14. Demo
Let’s have some fun.

16. Neural Network Typing Authentication
TJ STAR
Luke Knepper