PIN codes for a phone with 4 digits. How to Set a Six-Digit Passcode on iPhone, iPad, and iPod touch

In iOS 9, Apple introduced the ability to set a six-digit passcode on iPhone, iPad, and iPod touch, and in the first technical update of Nine, such passwords were activated by default. If you want to further protect your device by installing six-digit password, then you can find out more about this process in this manual.

Compared to four-digit codes, which require trying about 10,000 possible combinations to select, six-digit codes are virtually impossible to crack using brute-force methods. To determine such a password, you need to go through about a million possible combinations, which the iOS security system, of course, will not allow you to do.

Of course, the user will have to spend more time entering a six-digit password, but this cannot be done to increase security, especially when the device does not have Touch ID. The process of setting a six-character password is quite simple, but for clarity, we have discussed it in detail below.

Step 1: Go to Menu Settings on your iPhone, iPad or iPod touch

Step 2. Select " Password" or " Touch ID and passcode» depending on device type

Step 3. Click on " Enable Password»

Step 4. In the window that opens, select “ Password options»

Step 5: Select the option " 6 digit code»

Step 6: Enter your desired password and confirm it to complete the installation

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23% of respondents choose a PIN in the form of a date - and almost a third of them use their date of birth. At the same time, almost all people (99%) keep bank cards various ID cards on which this date is printed. If an attacker knows the cardholder's birthday, then the probability of guessing the PIN code soars to 9%.

Despite the important role of PIN codes in the world's infrastructure, there has been no academic research into how people actually choose PIN codes.

Cambridge University researchers Sören Preibusch and Ross Anderson have corrected the situation by publishing the world's first quantitative analysis of the difficulty of guessing a 4-digit bank PIN.

Using data on password leaks from non-bank sources and online surveys, scientists found that users take the choice of PIN codes much more seriously than the choice of passwords for websites: most codes contain an almost random set of numbers. However, among the initial data there are also simple combinations and birthdays - that is, with some luck, an attacker can simply guess the treasured code.

The starting point of the study was a set of 4-digit sequences in passwords from the RockYou database (1.7 million), and a database of 200 thousand PIN codes from the blocking program iPhone screen(base provided by application developer Daniel Amitay). In the graphs built from this data, interesting patterns emerge - dates, years, repeating numbers, and even PIN codes ending in 69.

Based on these observations, scientists built a linear regression model, which ranks the popularity of each PIN based on 25 factors—for example, whether the code is a DDMM date, whether it is an ascending sequence, and so on. 79% and 93% of PIN codes in each set meet these general conditions.

So, users choose 4-digit codes based on just a few simple factors. If bank PIN codes were chosen this way, 8-9% of them could be guessed in just three attempts! But, of course, people are much more attentive to bank codes.

In the absence of any large set of real banking data, the researchers surveyed more than 1,300 people to assess how different real PIN codes were from those already considered. Given the specifics of the study, respondents were not asked about the codes themselves, but only about their compliance with any of the above factors (increasing, DDMM format, etc.).

It turned out that people really choose their bank PIN codes much more carefully. About a quarter of respondents use a random PIN generated by the bank. More than a third choose their PIN using old number phone number, student ID number, or other set of numbers that appears random.

According to the results, 64% of cardholders use a pseudo-random PIN, which is much higher than the 23-27% in previous experiments with non-bank codes. Another 5% use a digital pattern (eg 4545), and 9% prefer a keyboard pattern (eg 2684). In general, an attacker with six attempts (three with an ATM and three with a payment terminal) has less than 2% chance of guessing the PIN code of someone else's card.

Everything would be fine, but, unfortunately, a significant portion of respondents (23%) choose a PIN code in the form of a date - and almost a third of them use their date of birth. This changes things significantly, because almost all (99%) respondents answered that they keep various identification documents with this date printed on them in their wallet with bank cards. If an attacker knows the cardholder’s birthday, then with a competent approach, the probability of guessing the PIN code soars to 9%.

100 most popular PIN codes:

0000, 0101-0103, 0110, 0111, 0123, 0202, 0303, 0404, 0505, 0606, 0707, 0808, 0909, 1010, 1101-1103, 1110-1112, 1123, 1201-1203, 1210-1212, 1234, 1956-2015, 2222, 2229, 2580, 3333, 4444, 5252, 5683, 6666, 7465, 7667.

P.S. In practice, of course, it is much easier for an attacker to spy on your PIN code than to guess it. But you can also protect yourself from peeping, even in a seemingly hopeless situation:

iOS 9 now asks for 6-bit passcodes by default when setting up, or updating, an iPhone or iPad. Here's how to get back to 4 digits

When I updated my iPhone to iOS 9, I was forced to choose a six-digit passcode instead of a four-digit one, and it was getting on my nerves. Is there a way to revert to a four-digit passcode?

Yes, you can change the six-digit passcode on your iPhone (or iPad) back to a four-digit passcode in iOS 9, and it's actually really easy—it's just that the option to do it isn't particularly well signposted. In this quick tutorial, we'll show you how to switch back to a four-digit passcode without losing the rest iOS functions 9.

How to change the passcode from six to four digits in iOS 9: Settings

The option you are looking for is in Settings app. Select Touch tab ID & Passcode from the menu on the left (You'll have to enter your current - apparently six-digit - passcode to access this section), then tap Change Passcode (in the blue text in the third section down). You will have to enter your old passcode all over again.

But now that iOS 9 asks for your new passcode, tap Passcode Options. (Simply missing.)

From the drop-down menu, select 4-digit Number Code and the number of spaces in your new passcode will drop from six to four.

Enter your four-digit passcode, check it, and you're there: You're back to the happy days of four-digit passcodes.

How to change your passcode from six to four digits in iOS 9: Why does my iPhone's passcode have six digits now?

As part of her drive increase security by Apple devices, the company now (in iOS 9) defaults to asking for a six-digit passcode instead of a four-digit passcode when setting up a new (or recently updated) iPad or iPhone. It's more secure, of course, but a little annoying, and some of the strategies we've heard people use to expand their four-digit passcodes into six digits without having to remember the new number suggest that security isn't going to benefit a huge amount .

How to stop your four-digit passcode changing into a six-digit passcode

If you have not yet updated to iOS 9, please note that you need to work around this issue by simply making sure you have a (four-digit) passcode enabled before running the installation. When the update is completed, you should still have the same passcode with the same number of digits. The problem only seems to happen if you turned off your passcode before updating.

I made the mistake of turning off the passcode on my iPad Air 2 for an unrelated reason, then going through the process iOS installations 9. I only realized the bug when iOS 9 asked me to create a six-digit passcode at the end of the update. Don't make my mistake - but if you do, well, as you see above, it's not the end of the world.