A set of requirements regarding password creation, storage, and usage. These requirements often constrain several characteristics of passwords. So, a password policy is a set of rules designed to enhance computer security by encouraging users to employ strong passwords and use them properly.

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Is there any risk in allowing more more failed login attempts before autobanning for a longer time?

By default most software seems to have rather low "burst" settings, like 3 to 5 login attempts before a temporary autoban for a couple minutes. Especially banks have a very low limit before access is ...
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1k views

Would a massive blacklist of guessable passwords be useful? [duplicate]

Suggestions to make a good password all focus on creating a string that a computer (or more likely, a network of computers with multiple GPUs) can not guess. Putting a password meter for when users ...
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2k views

Why do some websites force users to come up with difficult passwords?

I can't understand why we commonly force users to come up with difficult to remember passwords. * Your password must contain at least one number, one uppercase character, and one special character....
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409 views

What are the weaknesses of my authentication scheme?

So, recently, after going through some infosec training (FutureLearn's Introduction to Cyber Security, which I heavily recommend as well-explained newbie material), I decided to take the plunge and ...
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120 views

How to implement a password change policy when user's centralized password is in a lot of places?

I would like to implement password changing in an organization but they have the domain controller/LDAP passwords "all over the place". They have the passwords in a lot of places, for example, in ...
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1answer
99 views

Unique Touchscreen Authentication Schemes

I am working on a new software application that will have access to millions of patient medical records. I want this to be secure. The initial thought process was to simply use a standard username ...
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190 views

How can I write a good corporate password policy?

Our company works in health care, and we've written a corporate security policy, including passwords. Something that I noticed about the policy and have commented on, it says the password should not ...
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4k views

Is it possible to detect password length from hash? Does doubling your password add more security?

Assuming a service doesn't store a plain text password, am I right in saying that the answer to this question depends on the service? On a bad service, the hash length is related to the password ...
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567 views

Is there any explanation (other than storing plaintext) for case-insensitive passwords?

I've come across a few organisations stating that passwords are case-insensitive. Obviously this is ridiculous, and a gigantic red flag from a security point of view. Is there any explanation for why ...
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862 views

Generate user a password instead of asking for one?

I'm trying to weigh the benefits of not allowing users to create their own passwords, but must pick out of a generated selection. Are there any examples of sites that use this approach? Workflow ...
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9k views

What do I need to do to secure log-in and registration for my website?

What security features do I need to have in-place to ensure that my website log-in and registration forms are secure?
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826 views

Insecure to require numbers in passwords?

Earlier, I went to a site that required a number and special character, and it got me thinking – wouldn't that make the password easier to brute force? If you assume most passwords have around 12 ...
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330 views

How many combinations does a specific password policy allow?

Recently I was arguing about password policies. Assume you have a policy which requires 10 characters and additionally at least one letter, one number and one special character. My companion was ...
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399 views

If A Password Is Unique, Does It Really Matter How “Strong” It Is?

People seemed to find this "If a Password is Super-Strong Does it Matter if It's Unique" question very interesting, but it actually reminded me that the converse question is interesting, too: If you ...
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393 views

Including and storing the order of character entry in a password as an enhanced security measure

I'm sure I will be quickly corrected if this is a stupid idea, or if it has already been tried. My question is: has this idea been tried before? If not, are there good reasons it would not work, or ...
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417 views

Does a random set of secondary passwords add any security?

My bank uses this rather uncommon policy of authentication. They of course have a password, which has quite strong password patterns like "use alphanumeric characters and symbols, 8+ characters" are ...
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1k views

Is Username/Display Name Login more secure than email login?

I recently started playing Star Wars: The Old Republic, which for those of you who don't know, is an MMO. Before playing the game, I would always log in with my email/password combo. However, I got an ...
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548 views

What to do when asked for a weak password

The guys who made the security for my country's state bank are completely nuts in all senses. Their internet banking password must be between 8 and 10 characters, and contain only letters and digits. ...
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1k views

Why does ebay prohibit certain characters in password strings?

I had to change my ebay.com password today and, to my surprise, I was not allowed to use certain characters. For example [ results in an 'invalid' password and the system refuses to accept it. Is ...
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1k views

Best practice for forgot password form, ok to leak that a given e-mail is invalid

On our forgot password reset form, is it ok to leak that a given e-mail address entered is invalid? Or should we always just return success and check your e-mail, even if the e-mail is not valid. I ...
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1answer
81 views

Is limiting/cutting password-length without notice insecure?

I have encountered that our linux system cuts the length of every password to a certain length, after that length every additional character seems to be ignored. Does this make our linux system more ...
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265 views

Is there a site like plaintextoffenders.com that shames companies that force insecure passwords?

I recently came across http://plaintextoffenders.com/ and I liked the idea. I wondered if there was a similar site that shames websites that force insecure passwords? I personally have a list of a ...
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397 views

How to prove a password guessing theory from Matt Bishop's book “Introduction to Computer Security”

First, this is not a homework problem. This is a problem from Matt Bishop's book "Introduction to Computer Security" which was used as one of the textbooks for a Computer Security class I took last ...
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241 views

Home “datacenter” security, where and what to look for?

This is a question to learn more about security management and physical security. I'm running a small serverroom in the basement at home, mainly as testbed for attacks I dont want to try on live ...
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1answer
282 views

Computer team's password change time different from other users?

We need to determine a password policy for our organization. All users, in general, will have 90 days until they will have to change their passwords, complexity required and passwords need to be at ...
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633 views

Password strength metrics

In the question Source code as password I suggested using a combination of entropy and as @Lawtonfogle put it 'meatspace difficulty'. As suggested in the xkcd comic correct staple horse battery is a ...
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1answer
95 views

Forgot Username/Email - Do extra credentials equal enough to log the user in?

I am working with another UX guy and he's let me know that there have been some studies surrounding the fact that when a person goes through a "forgot username/email" process, they enter in extra ...
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598 views

What implementations are possible for dual control?

An organization requires employees to use 2 person authentication in some scenarios. That is, when accessing, say, a server, secret knowledge from 2 people should be used for authentication. No one ...
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1answer
117 views

Protecting SSH service with many inexperienced users

One of the universities I know has a rather unique password policy. They issue shell accounts to all computing students with strong passwords that are unchangeable. It is done via the passwd -n flag ...
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287 views

Why is password strength often underestimated and uncertain in the context of password hashing?

An aspect of security has bugged me for a long time: Why is there positive certainty about the importance of hashing algorithms and salts, but password strength is either never mentioned at all or ...
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240 views

Guidance for “image based” password reset challenge

Thycotic has a Password Reset Server that allows the user to select from several images. What general guidance is there for an image-based password reset challenge question? Examples may include ...
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119 views

What is the argument for the fairly prevalent “No more than n repeating characters” password rule?

So, I understand why most commonly used password policies are used. N character minimum? No low hanging fruit left for brute force attacks. N character maximum? The database field can only be so ...
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1answer
333 views

How does the mobile security technology APNS and 3LM work?

APNS is an iPhone technology that assists with mobile push. 3LM is a BIOS-level security technology embedded in certain Android phones. I recently got off the phone with Boxtone and they said they ...
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834 views

How to tell if a site is securely storing passwords? [closed]

A site I frequent has a policy to make you change your password every 90 days. That's a cool policy, but I stumbled upon an old xkcd and facepalmed myself, because lots of doxing happens on this site. ...
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199 views

Generate DB Password from license key - a good idea?

There's this web app which has a SQLServer database, and the connection string it uses to access the database is not stored in any configuration file. Rather, the designers decided it would be a good ...
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5answers
311 views

Is there any good (or less bad) way to handle a web portal or website with awful security?

Background: I'm facing a situation with an online site I must (for the immediate time being) use for financial and HR-related matters that just sucks. In every sense, but security in particular. As ...
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5answers
534 views

How secure is changing or adding a single character in your passphrase?

I'd wager quite a many people are required to periodically change their passwords for certain applications or even at the office. I'd also wager that a large percentage of these people "change" their ...
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2answers
273 views

Doesn't adding requirements to a password, such as must contain 2 digits, decrease the strength? [duplicate]

Possible Duplicate: Doesn’t imposing a minimum password length make the password weaker by reducing the number of possible combinations? Doesn't any constraints added to a password policy ...
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1answer
115 views

Why, after a certain character limit, are larger passwords labeled as “weak” on some sites?

On many sites we see an indicator if our password is weak, or strong, to give us a good indication to go with that password, or not. I've been noticing on some sites, that after x amount of ...
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180 views

Prevent password reusing across different sites

I'm generally against too strict or complex rules to accept passwords (rules like "It must contain at least one upper-case character, one number and one symbol" and things like that, see also XKCD #...
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2answers
296 views

Adding a new user: email temp password vs link with token

I'm a developer working on a website for the first time and have a question about new user activation. The way our site is setup now a user creates a new account and they get emailed a temporary ...
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3answers
1k views

Is it ok for software to store passwords locally in plain-text?

There are already plenty of questions about what to do when websites store plain-text passwords. But this one is a little different. I use a piece of open-source (see below) software for playing ...
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2answers
198 views

What exactly is the impact on security when forcing user passwords to contain a particular character?

Some years ago a sysadmin of large computing centre (on a campus) enforced the password of every single user to contain the character $ at an arbitrary position. They soon dropped this policy but I ...
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1answer
106 views

Is locally reusing a password a bad practice?

All my valuable data is in VeraCrypt volumes. The (very strong) keys of the volumes are stored in a single KeePass database, which uses a reasonably strong password. I want to encrypt my backups too, ...
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2answers
2k views

What are the pros and cons of using a password safe instead of writing passwords on paper?

Many companies have policy again writing passwords and paper and I wonder if there reasoning is sound. Is it always better to use a software password safe than writing passwords on paper? Here are ...
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1answer
690 views

Why are lengthy passwords stronger than complex ones? [duplicate]

So all my life I've been listening to people tell me to make my password complex: upper case / lower case / numeric / symbols. Recently though I've been reading / seeing that length above all seems to ...
3
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4answers
188 views

Password Policy: Issue random generated passwords / Let the user choose a password

I'm currently thinking about a new password policy. Originally I wanted the users to choose a password that is X digits long, contains numbers, special chars, lower and upper case,... but then I did ...
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3answers
168 views

Are there risks associated with a strong password reuse for disk encryption?

I understand the risks of password reuse when we share the password with 3rd parties as perfectly discussed under this question: Is password reuse a problem if the password is very strong? However I ...
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265 views

Are weak passwords acceptable for internal development?

We have a number of internal development environments that use weak passwords in the Auth and SQL components; particularly using passwords such as "password" or "Password1". These are obviously ...
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297 views

When changing a password, does it have to be completely different?

When changing a password how important is it to have a significantly different one? For example is it bad to reverse the sequencing of the old password to make a new one or change a few numbers?