One year ago I created a contest in this forum for the creation of an app in a graphical programming language called LabVIEW.
The prize was 5 BTC but due to the explosion of bitcoin I am coming to terms with the only participant I got to pay him $100 USD and close/terminate the contest.
You can download the solution on the thread at:
https://bitcointalk.org/index.php?topic=137197.0![](https://ip.bitcointalk.org/?u=http%3A%2F%2Foi43.tinypic.com%2Fa4tp1d.jpg&t=663&c=I7KOh7bmC35ezA)
This actually gave me the idea of creating paper/brainwallets using patterns resembling a bit the "swipe patterns"
used for password on android.
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fi42.tinypic.com%2F302qah4.jpg&t=663&c=GeMYas53IlFsew)
You just need to get the LabVIEW software and run the main.vi app and boom you have an offline calculator to create your graphical paper/brainwallets.
You just need to toogle the 256 boolean buttons with a pattern that you cannot forget and load your new bitcoin address and you are good to go!
It is not as secure as using a completly random private key without any graphical pattern. But if you use it wisely and with some complex patterns it can get very secure.