Keypad Security Timer

Requires a Wolfram Notebook System
Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.
Some keypad security devices compare the last digits entered with their stored
digit key sequence. Entering all possible sequences as a de Bruijn sequence requires typing
characters.
Contributed by: Michael Schreiber (March 2011)
Open content licensed under CC BY-NC-SA
Snapshots
Details
The timing assumes that entering one charcter takes one second.
Permanent Citation
"Keypad Security Timer"
http://demonstrations.wolfram.com/KeypadSecurityTimer/
Wolfram Demonstrations Project
Published: March 7 2011