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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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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301 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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336 views

how to check for duplicate passwords

Is it possible to check if like 100 people are using the same pasword? without risking anyones password getting out? I heard google does this, not allowing the user to set a password 1000 people are ...
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316 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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386 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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411 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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3answers
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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531 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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409 views

How does one make password easily forgettable?

Is there any phycological research that appears relevant to making passwords easily forgettable under adverse circumstances? Circumstances might include when under duress, after some duration of ...
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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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264 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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353 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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68 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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240 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
281 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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587 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
90 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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540 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
115 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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277 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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233 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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3answers
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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332 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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566 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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765 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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8k 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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198 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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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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266 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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143 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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274 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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190 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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84 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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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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163 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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236 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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284 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?
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108 views

how is strength of password calculated from standard keyboard patterns?

In password strength calculator is there an algorithm to determine the keyboard pattern? there could be thousands if not millions of patterns that could be generated with a standard qwerty keyboard. ...
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1answer
664 views

Updated list of bad/overused passwords [closed]

I am building a website, and I'd like to make sure the users don't put an overused password like password or password1.. or any of these Is there a place that constantly analyzes hacked websites ...
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475 views

Same User, Different Access Points, different passwords?

We have a system (e.g. purchasing) where there are multiple access points. One is a back-end desktop application only accessible by employees within the LAN, the other is an Internet accessible Web ...
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1answer
87 views

Unable to completely enforce password policy

PCI DSS has a few requirements regarding the password policy (like remember last four passwords, change password every 90 days, use at least seven numeric and alphabetic characters and more). These ...
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162 views

Account-lock security policy (username/password)

I am currently working on an application with regard to applying a security policy to the application. We are locking the account after X failed login attempts in Y minute. The account will be locked ...
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1answer
1k views

Why do some large companies still store passwords in plain text/decrypt-able format? [closed]

In the last couple of weeks I've come across two fairly large companies who seem to not have stringent password security: Tesco - they store passwords in an "encrypted" format, yet they can decrypt ...
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195 views

In what situations are web services required to protect confidentiality of user information?

I know that if a web application needs to be PCI-DSS or HIPAA compliant the user personal identifiable information (e.g. user password, etc) needs to be kept confidential. Under what other situations ...
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347 views

Is a One Time Password Scheme based on Diceware viable and secure?

I recently learned about diceware and was thinking about how it could possibly be used to create a one time password scheme. I'm thinking S/KEY is probably more appropriate, but would a system that ...
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248 views

Similar passwords can't be used again. A sign of unhashed password storage? [duplicate]

In my school everyone must change their password every six months. The new passwords cannot be the exact same as the old one, this make sense, however many of my peers often complain that they need ...
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6answers
2k views

Does Username + Password + Pin improve login security?

I've been asked to add a feature to a website to require a pin for users. The site currently uses username and password. If a user wants to change their password they need to supply the current ...
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173 views

Is it good practice to mandate input action on the password field in a webapp?

I am of the school of thought that says you should never have the browser "remember your password" because if you use it often enough, you will be able to retain that piece of information. I now want ...