If you are fans of customizing your iPhone, then the Epicentre tweat certainly should please you. Not yet available on Cydia, it has been tested by IDB made a video about the Cydia tweak
Epicentre allows to change the basic interface of the iOS password by a nicer appearance and round-inspired old phones.
The tweak embeds several customization options in the settings, here is a demo:
You have the choice between two seizures, the first makes typing on every issue or else by sliding your finger from one to another number. Once the password is correct, you will see a green center button which will validate it. You also can change the learn more or less large buttons and square or round.
Epicentre also acquired an option to blur the figures while keeping their original position. So, nobody will be able to see your code as you type.
Epicenter will soon be available on Cydia Store for $1 from the source BigBoss repo.