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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17
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1answer
754 views

Does a maximum length of password mean non-hashed storage?

When a system requires a password between say 6 and 20 characters in length, does it mean the password is stored without using a hashing function, and that the mysql-field (or similar) is 20 ...
1
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3answers
425 views

Password Security and ocl-Hashcat-plus

I recently read the Ars Technical Article about new features in ocl-Hashcat-plus. In light of questions like: Long Passwords: How are they more secure? and XKCD #936: Short complex password, or ...
2
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4answers
198 views

Why do some passwords not allow certain types of characters?

Is there any programing related reason why some password cannot have certain characters? If the idea in storing a password is to store it's hash, since a hashing function can take any input (ok at ...
29
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5answers
2k views

Are there any guidelines for passwords that need to be read out loud?

I recently saw the movie Olympus Has Fallen. Like in many action movies, at the end a missile is launched, and the hero (Mike Banning, played by Gerard Butler) has 60 seconds to recall the launch in ...
2
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3answers
238 views

Alternatives to Common Password Retrieval

Wired wrote an article recently about the top tech fails of 2012 and to no surprise, the password was on the list, more specifically the way a user can retrieve their passwords. What are some nifty ...
0
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2answers
154 views

Is my domain registrar storing my password in cleartext? [closed]

I called my domain registrar (unnamed here but not difficult to find out and a major provider) about a year ago to have them change some DNS settings. While on the phone, the customer service rep had ...
6
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2answers
268 views

What does “Change your password everywhere else” e-mail from compromised service mean?

I've recieved an e-mail from ubuntuforums.org a couple of hours ago: [...] the attacker has gained access to read your username, email address and an encrypted copy of your password from the forum ...
10
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2answers
1k views

Password auditing

Most password policies require the password to be at least 8 characters long and contain symbols from at least 3 classes (lower case letters, upper case letters, numbers, other). Problem is, that a ...
4
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2answers
371 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 ...
27
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3answers
1k views

Is there a security reason for a site to limit the number of times a user can change their password?

Is there a security reason to disallow a user to change their password as frequently as they want? I have found this security policy in a site and I am not sure why it is enforcing it. One reason I ...
2
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5answers
273 views

Is accepting old passwords a bad policy?

This question is inspired by an experience I had today with online banking, as follows. One year ago I opened an online deposit account. (Without naming the bank, I will say the company is currently a ...
0
votes
1answer
555 views

Why do website limit password length? [duplicate]

I just made a new account with some eGov service (Belgian government). I use LastPass (generate long random strings for each site). But the system told me that the maximum allow length was 16 ASCII ...
2
votes
2answers
121 views

What are the vulnerabilities of reusing passwords for generation of keys and encrypted files?

The main reason why reusing a password for different accounts is not recommended is that if the password is compromised, all accounts are compromised. This question is about vulnerabilities other ...
3
votes
0answers
242 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 ...
11
votes
3answers
2k views

Why are passwords limited to 16 characters?

What is the reason that most websites limit to 16 characters? I would have thought the longer the password the more difficult it makes it for someone to crack it? Is it something to do with hash ...
24
votes
10answers
4k views

Intel How Strong is Your Password page, good advice?

I came across this Intel How Strong is Your Password? page which estimates how strong your password is. It has some advice on choosing better passwords including that you should use multiple ...
11
votes
5answers
391 views

What is the best way to hand out passwords to a widely spread diverse employee base?

I have a problem I need to solve - specifically, how to hand out passwords to people in a variety of locations, and with a wide variety of access. I've thought of some options, but there are ...
-4
votes
1answer
816 views

Good Password Length [duplicate]

If you are looking to be careful and your passwords include all the types of characters, what is the ideal password length?
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5answers
212 views

Should I enforce a password policy on a web site?

For a commercial web site, is it important to impose some restriction on passwords to access the system? Eg. special $char, Upper and lower case, numbers, at least a minimum length... Can a CAPTCHA ...
24
votes
8answers
6k views

Why Not Allow Special Characters In a Password?

The culprit in this case is a particular (and particularly large) bank. I know one that does not allow special characters (of any sort) in their passwords. Is their any valid reason for doing this? ...
4
votes
2answers
412 views

How often should passwords change?

I'm asking two very related questions As an admin what policies should be enforced regarding the frequency of password changing? I have an idea that users should be forced to change their ...
2
votes
1answer
239 views

Why are Lengthy Password Stronger Than Complex? [duplicate]

So all my life I've been listening to people tell me to make complex password: Upper / Lower / Numeric / Symbols. Recently though I've been reading / seeing that length above all seems to make for ...
0
votes
1answer
137 views

What rules should be enforced for users to create a strong password?

I'm looking for a definitive guide to the rules that determine a "strong" password for website authentication. It seems many websites have many different rules, and I'm not sure what is the best ...
1
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3answers
2k 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?
3
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2answers
145 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 ...
4
votes
3answers
604 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 ...
3
votes
5answers
1k views

Password reset links: random value or authenticated message?

Which is better? Create tamper-proof encrypted password reset token which contains the user id and the expiration time within the encrypted token. Generate a random token and store it in the ...
2
votes
3answers
304 views

Account lockout with human interaction required to unlock

I just got locked out yet again from my university's system for typing the wrong password twice, then mistyping the correct one by accident. Now I have to call the helpdesk or go there myself to reset ...
10
votes
3answers
338 views

Is it inconsistent to tell users to “not click on password links in email”, and requiring clicks on “forgot password” links?

On one hand, IT Security shops have been telling users to not click on links in email because they can do damage to your computer, or phish your personal information. Many of those issues are ...
3
votes
4answers
161 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 ...
4
votes
4answers
497 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 ...
8
votes
2answers
377 views

Banning specific passwords?

There have been a couple of questions about enforcing good passwords, so I thought I'd add my own: In addition to enforcing a minimum Shannon entropy, would it generally be a good practice to ...
0
votes
2answers
439 views

What are RealVNC 5.0 Authentication Protocol Security Limitations?

In the old version of RealVNC, the password length was limited to 8 characters which was easier to be cracked. They have now increased the password length by 255 characters, will this make Realvnc ...
5
votes
3answers
383 views

Use of rainbow tables with the NY Times hack?

The NY Times recently published a story about how they were hacked during a four month period. The hacks allegedly were carried out by part of the Chinese military. One part of the story that ...
3
votes
7answers
1k 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 ...
0
votes
2answers
944 views

Can my ISP know my passwords

If I am using some proxy service, proxy service provider can know my passwords to my online accounts. In which case my ISP can filter my requests and get my passwords to my online accounts? And how ...
0
votes
6answers
383 views

Using passwords made of words

People say don't use passwords in the dictionary but if you use two words isn't it alright? Dictionaries have at least 10,000 entries so just two words will be 100,000,000 possibilities (and that's ...
0
votes
3answers
994 views

Is it possible to change the wifi password with a script?

I was wondering if it is possible to change the password for a wifi with a script instead of having to log-in to the routers firmware?
2
votes
3answers
220 views

At what point is password complexity “safe enough”

Obviously the best passwords will be highly complex randomly generated passwords stored in a password vault. For the average user though, this might be a slight overkill. Assuming that the average ...
3
votes
2answers
159 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 ...
7
votes
5answers
471 views

Are we concentrating too much on password complexity?

As a developer and/or user, do I really need to worry about password strength if the system does not allow brute force attack to be feasible (implements a delay or attempt counter) or implements a ...
3
votes
1answer
215 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 ...
21
votes
5answers
2k views

Is it common practice to log rejected passwords?

While selecting unique passwords for each purpose is a great idea, in practice this rarely happens. Therefore many select passwords from a personal pool of passwords that are easily remembered. When ...
3
votes
2answers
218 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 ...
17
votes
7answers
3k views

Why don't people hash and salt usernames before storing them

Everyone knows that if they have a system that requires a password to log in, they should be storing a hashed & salted copy of the required password, rather than the password in plaintext. What I ...
3
votes
1answer
446 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 ...
15
votes
4answers
963 views

My credit union is reducing its maximum password length to 10 characters

I just received an email from my credit union saying they are redesigning their online banking service and that I will need to change my password by October 22 to conform to the new limit of 10 ...
1
vote
2answers
408 views

Is dual control password is a feasible way to secure against unauthorized login?

I see that some organizations practice dual control password especially when it comes to critical system logins, etc. Is it feasible to implement such policy considering certain trade off such as ...
25
votes
12answers
3k views

How secure are passwords made of whole english sentences

I often read as an advice to build strong passwords, just to think about a sentence and then take the initial letters. For example take a nonsense sentence like "I watch Grey's Anatomy at 9.40" gives ...
2
votes
6answers
763 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 ...