4 ms·
If you pick a common 4-digit PIN, there are 10 000 possibilities for your PIN code. Given that your card will block after 3 incorrect tries, the probability tha
by Tijdreiziger 9y ago
If you pick a common 4-digit PIN, there are 10 000 possibilities for your PIN code. Given that your card will block after 3 incorrect tries, the probability that a thief will correctly guess your PIN code is ~0.03%. If you pick a 5- or 6-digit PIN, that probability is 0 for all intents and purposes, since it's extremely likely that the thief will assume a 4-digit PIN.
- DominikPeters 9y agoIn most countries, you cannot choose the length of your PIN; often it is limited to 4 digits, and e.g. some ATMs don't even wait for you to press enter after you enter the fourth digit (UK).
- ajdlinux 9y agoIn Australia you can choose a PIN up to 6 digits, though the banks may warn you that a >4 digit PIN can be problematic in countries like, well, the UK I suppose. edit: huh, it's actually more than 6. According to Commonwealth Bank, it can be up to 12.