[Jake22]

It is 4 digits for chrissake!

Before mobile phones used to be so prevelent - most people were quite used to remembering 7 digit numbers with pretty short order.

One 4 digit number is no bother at all. Just pick four that people won't be able to guess from any of the contents of your wallet or knowledge of you (e.g. don't use date of birth, birth year etc.)

[S23a]

(Original post by Mad Vlad)
Selecting a memorable random 4 letter word that isn't anything personal to you, as muffingg suggested, is just as good as getting a pseudo-random number generator to do it. Remember, this PIN does not have to stand up to days of brute force against a billion Dollar supercomputer - it has to withstand 3 attempts.

(Original post by marcusfox)
Like others have said, it just needs to be unguessable in 3 attempts. And you carry it with you so you won't forget.

Job done.

If you have a handheld card reader from for example Barclays, Nationwide, Natwest or RBS, it will tell you if the PIN you enter is correct, so it is possible to pre-check the PIN before you go out.

An interesting study on card readers by Cambridge: http://www.cl.cam.ac.uk/~sjm217/pape...9optimised.pdf

[marcusfox]

(Original post by S23a)
If you have a handheld card reader from for example Barclays, Nationwide, Natwest or RBS, it will tell you if the PIN you enter is correct, so it is possible to pre-check the PIN before you go out.

An interesting study on card readers by Cambridge: http://www.cl.cam.ac.uk/~sjm217/pape...9optimised.pdf

If you enter it 3x wrongly on a card reader, it will block your card

[wateva]

have it same as mine 4688

[Manitude]

Pick one of these at random:
http://thewilliamspres.hubpages.com/..._is_yours_here

[Theturnbull9]

is this a serious question?

[Robbob16]

Mine is 2343, use it if you will


This was posted from The Student Room's iPhone/iPad App

[JMET]

Use 6673. I've found it easy to remember