Everything is done online these days, including banking. PD uses standard security techniques.
Voting is anonymous and we cross-check voters with the Australian Electoral Roll. If you leave your phone unlocked, logged in to PD (we recommend not allowing your device to automatically save your passwords) and someone votes on a bill or decision as you, next time you log in it will show you have voted when you have not. You will be able to change your password and vote again.
Voting is over a long period of time, making is easier to detect voting irregularities. Algorithms will be used to analyse and identify irregularities allowing us to mitigate issues. In addition, voting results are transparent and the software is open-source enabling independent analysis. We also plan to use a network of independent electronic scrutineers.
On August 9th the Australian Bureau of Statistics (ABS) and Census websites were attacked by a Denial of Service (DoS) attack.
This is basically a process where many computers send signals to one website and overload it, forcing it to shut down, pretty much like a traffic jam.
People Decide is different from the Census. It holds much less personal data and voting is over a long period of time. It is hard for DoS attacks to last a long period of time because they have to employ a large amount of computing power which costs money.