Is it just me, or is it almost equally possible that you would see the 'double' tap print on the digit that is repeated anyway? This would then reduce the poss

Is it just me, or is it almost equally possible that you would see the 'double' tap print on the digit that is repeated anyway? This would then reduce the possibilities to 12 instead of 24 resulting in a less secure code. I think the other solution presented in the comments of the post offer a far superior result: Randomize the position of the digits displayed each time. This way you cannot relate a tap print to either a digit or a relationship to another. If you really want it even more secure (unable to tell if the user has used a digit more than once), randomize the positions after each entry. Of course, these solutions have a downside in that you will enter the code slightly slower and thus slightly increase the risk of 'over the shoulder' attack vectors.