How to Implement a Strong Password Policy. Best Practices and Mistakes to avoid
Your employees might already be aware of a few password security practices. But are they actually following the latest recommendations? In fact, are you aware of what makes up a strong password policy? Both you and your employees could be (unknowingly) making common password mistakes and applying antiquated password security guidelines. So, keep on reading to make sure you’re in alignment with the most recent password requirements.
In this article, I’m going to share with you pieces of advice on how you can prevent the most frequent password mistakes and how you can create a strong password policy for your organization.
Some of the points covered in this article may seem controversial at first glance and completely out of sync with the password security rules that we’ve all grown accustomed to by now. Nonetheless, they are supported by the latest password guidelines released by The National Institute of Standards and Technology (NIST) – NIST 800-63-3: Digital Identity Guidelines. For those unfamiliar with this institution, to give you a quick background, they are a non-regulatory federal agency within the US Department of Commerce, whose guidelines oftentimes have built the foundation of the security industry’s standards.
The NIST paper isn’t new. In fact, it was released more than two years ago. Yet, many organizations still seem to be ignoring it and this is why we’ve decided to bring it into the spotlight and present their instructions on password security.
What are the Best Practices for Creating a Strong Password Policy?
Older NIST password security guidelines required enforcing policies such as using highly complex passwords, changing them regularly, and forbidding password reuse. However, their newest guide is based upon a quite radically different approach.
Does this mean that your employees should be setting their passwords to “Password1234” and never change them?
Of course not. This new approach is focused on making password management easier and more user-friendly. It has been created based on studies showing that very strict password policies only lead to poorer password habits. When it comes to choosing a safe password manager, you must be certain that it will deliver on its promises to the fullest extent possible; after all, it will be responsible for safeguarding your username, passwords, and even financial information.
Below you will find password security recommendations that will make it slightly easier for your employees to comply with and for you to keep your business secured. So, here is what you should do to promote healthy password security management among your employees based on NIST’s recommendations:
#1. Stop asking your users to change their passwords on a predefined schedule
First of all, your users will be thankful that they won’t have to create new passwords and remember the new ones every 90 days (or even more frequently). Most of them do not even change their passwords entirely anyway and only add an extra character at the end every time they are required to modify them. So how does this practice reinforce password security?
Periodic password resets have been created in order to reduce the period of time a system is exposed due to an account potentially being compromised. But why change passwords if there is no suspicion of a breach? Useless password resets burden users and creates additional tasks for sysadmins if, for instance, your employees forget them and require password resets.
So, how often should your users change their passwords?
According to NIST, passwords should NOT be changed unless there is evidence of a data breach or any reason which shows a specific account has been compromised. In other words, only when there is a possible danger related to an account should password resets be mandatory, rather than making your users change their passwords on a predetermined schedule.
However, it’s really important for you to provide your specialists with the proper cybersecurity tools to monitor users’ activity and identify compromised accounts in real-time.
Microsoft has removed the password expiration policies from their Windows 10 security baseline. Here is what they wrote on their blog:
Periodic password expiration is a defense only against the probability that a password (or hash) will be stolen during its validity interval and will be used by an unauthorized entity. If a password is never stolen, there’s no need to expire it. And if you have evidence that a password has been stolen, you would presumably act immediately rather than wait for expiration to fix the problem.
Periodic password expiration is an ancient and obsolete mitigation of very low value, and we don’t believe it’s worthwhile for our baseline to enforce any specific value. By removing it from our baseline rather than recommending a particular value or no expiration, organizations can choose whatever best suits their perceived needs without contradicting our guidance. At the same time, we must reiterate that we strongly recommend additional protections even though they cannot be expressed in our baselines.
– Aaron Margosis, Microsoft Security Guidance blog
#2. Encourage your users to select long and easy to recall passphrases
It’s time to move beyond complicated passwords based upon highly complex construction rules. It will be much easier for people to remember phrases that actually make sense to them instead of memorizing strings of completely random characters. However, the passphrase should not be something too obvious and tightly related to something which defines them as individuals (and might also be at hand for malicious hackers on social media).
|Traditional Passwords||NIST Passwords|
|Highly complex string of random characters|
|Long and memorable passphrases
Example: “It’s so easy to create strong passwords with NIST’s guidelines!”
Example: “I’m really looking forward to this year’s holiday season.”
Of course, longer passwords composed of various types of characters are more difficult to decipher from a cryptographic standpoint. Nonetheless, traditional password construction rules make them harder to remember and seem to only be making users end up choosing insecure passwords. According to NIST, IT systems should allow a minimum of 8 characters and a maximum of 64 characters and include all kinds of characters including punctuation and spaces. The minimum required password length proposed by NIST is still 8 characters.
Sometimes, many password-related attacks are not affected by password length and complexity at all. Unfortunately, complicated passwords completely fail when it comes to social engineering attacks, credential stuffing, keyloggers, or phishing/spear phishing, but this is a whole different subject that I’m not going to dive into in this article.
#3. Implement multi-factor authentication
NIST’s guidelines also advise on the implementation of multi-factor authentication, which can considerably increase security without further burdening users with complex requirements. Multi-factor authentication encompasses a wide range of authentication technologies, such as biometrics, smartphone apps/codes received via text messages, or token devices which will provide an additional layer of security.
#4. Cross-check passwords with password dictionaries
A password validation dictionary that contains commonly used and insecure passwords is also necessary. This way, unsafe passwords will be automatically rejected by your system.
Let’s say a user creates a password of the minimum required length that also happens to be highly insecure. And let’s suppose that the password will not be prohibited by the restricted passwords list, yet the chosen password can be easily hacked.
Since NIST does not provide a list of “bad” passwords, organizations should create their own notorious password databases and constantly update them. According to the paper featured in the ISACA Journal, the open-source repository “SecLists” on GitHub or the password validation tool “NIST Bad Passwords” can be good starting points for you to create your own internal password dictionary.
Also, the same publication advises against forgetting about context-specific passwords. For instance, you should take into account the usage of a user’s own name, the company’s name or anything closely related to the organization they are part of.
In essence, a generic password dictionary will not be able to block anything related to an individual user, which brings us to the next point.
#5. Constantly revisit and update your password policy
Unfortunately, a one-size-fits-all approach when it comes to password policies is not advisable. Every organization must create a policy that covers custom password restrictions and revise them constantly. What’s more, if a data breach ever takes place, all compromised passwords must be included in the forbidden passwords list.
#6. Train your users
Last but not least, make sure that in your cybersecurity training sessions you teach your employees how to form passwords based on the most recent NIST guidelines. After they’ve been properly trained, they should be able to correctly identify which passwords are secure and which ones are not.
- Recommended Password Length— 8-64 characters.
- Character types — All available characters are allowed and encouraged.
- Multi-factor Authentication — Highly encouraged.
- Password Construction — Long passphrases instead of complex passwords are recommended. There must be no match between them and the password dictionary.
- Password Reset Frequency — Only if the password is forgotten or at first signs of compromise.
Examples of Password Mistakes Made by Your Employees
I’ve already gone through password construction rules, but there are more best practices in regard to password security that your employees should follow. They may seem obvious for most people, however, be certain you still include them in your cybersecurity training sessions as a reminder.
#1. Reusing the same password
Your users may be using the same passwords for different business-related accounts – for instance, for their email login account and an online third-party service where they registered with their corporate email address. If that specific website gets hacked, chances are that cyber-attackers will use their passwords to try to log into their accounts. This tactic is called credential stuffing and is a practice highly employed by cybercriminals.
What’s more, another mistake can be reusing a password they’ve set up for a personal account on their business account, since the same type of attack could easily happen.
#2. Sharing passwords
Needless to say, your employees’ passwords must always remain confidential. They should never share them with other employees or members outside of your organization.
#3. Not using a password manager
We can all agree on the fact that remembering a different password for each account is a hassle, especially for third-party websites. However, when using password managers, your employees will only need to remember the one used to access their password manager, where all their passwords are stored.
#4. Skipping multi-factor authentication
Multi-factor authentication can dramatically reduce fraudulent login attempts, so make sure that you’ve set up this option on your organizations’ accounts and that your people do not have the possibility to skip it!
#5. Changing a single character of the password after you’re suspecting their account has been compromised
If cybercriminals have managed to guess their password, if the new one is just slightly different, chances are the password is going to be hacked once again. So, make sure your users understand and apply the password security guidelines presented in-depth above.
#6. Storing passwords in plain text on their devices
Your employees may be keeping their passwords in plain text and that is, of course, a terrible practice, since the passwords could be easily accessed by malicious actors. Thus, they should stay away from storing them on their phones, spreadsheets, text files, or emailing the passwords to their personal email addresses for whatever reasons.
#7. Writing them down in easily accessible places
No one should write down their passwords on post-it notes kept on their desks, hidden under the keyboard, written on their day planner, etc. The danger of insider threat might linger inside your organization.
#8. Logging into their business accounts on unsecured networks or devices.
If your employees want to connect remotely and use an open public Wi-Fi network or enter their login credentials on a personal device that is not properly secured, their connection could be left open to snooping. In this case, they should always use a VPN.
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The guidelines proposed by NIST truly have the capacity to aid IT professionals to strengthen their defenses without unnecessarily burdening their users. Nonetheless, organizations that have adopted them or are considering implementing them, should completely understand the logic and approach behind. And most importantly, security professionals must first comprehend the cybersecurity risk profile of their company to create strong password policies.
What do you think about NIST’s password security guidelines? Have you already implemented them inside your organization?
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