If a malicious person gains access to your PINs and ID-card, he or she will be able to impersonate you in the internet and give a legally binding digital signature on your behalf!
You should know the following:
- Do not disclose the codes of your ID-card to other persons.
- Never write any of the codes on the card or keep the codes with the card. Keep the codes in a safe place or preferably memorise them and destroy the code envelope.
- If possible, change your PIN1, PIN2 and PUK codes immediately after receipt of the card.
- Do not use the same number combinations as PIN1 and PIN2 for the sake of easier remembering.
- The codes should be changed also on regular basis after certain periods of use of the card in order to minimise the security risk of someone seeing you enter the PIN and abusing it later.
- The minimum length of PIN1 is 4 digits, whereas PIN2 should consist of at least 5 digits.
- The maximum length of PIN1- and PIN2-codes is 12 digits.
- The length of PUK-code can be from 8 to 12 digits.
- When choosing new codes, avoid easy-to-guess combinations, such as 12345, 11111, your birth date, etc. Also, remember to use different combinations for PIN1 and PIN2. At the same time, you should be able to remember the codes easily, as writing them down constitutes a security risk.
- A way to generate a safe and easy to remember PIN is as follows: think of a word that you would remember and see what digits correspond to the letters on the keypad of your (mobile) telephone. The word "house", for example, corresponds to "46873".