The functions performed by the person or processes responsible for security of passwords on a given system.

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3
votes
1answer
665 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 ...
1
vote
3answers
272 views

For what do I hash user passwords with PDKDF2 when the user data is stored in the same database?

I'm hashing the passwors of my users with PDKDF2 right now. A user can gain access to his account with his password. When the user is logged in he can edit his personal information and do other stuff ...
2
votes
2answers
6k views

Sample challenge questions for use with self service password reset and validation

I'm building a secure password recovery feature similar to the one described here. During the final phase of the password recovery, the user is asked a recovery question to verify their identity. ...
3
votes
1answer
193 views

How should I store a password to allow people to enter single characters from it? [duplicate]

Possible Duplicate: How do some sites (e.g. online banks) only ask for specific characters from a password without storing it as plaintext? Some banking applications ask for random letters ...
1
vote
1answer
416 views

Securely tell the user his password in new WHM/Cpanel account creation?

I understand it's not safe to send passwords via email but when accounts are created via WHM/Cpanel, I have to let the user know what password I created for them. How can I relay the password safely?
8
votes
2answers
645 views

Is there more to password hashing?

You have a plain text password and salt. The plain text password is assumed to be securely random and only known by the user and the salt is no secret and not necessarily unique but stored alongside ...
2
votes
1answer
356 views

How can passwords be stolen from Yahoo?

I always understood that servers don't actually store user passwords. Instead, they store hashes of passwords and then they validate the user input by applying the hash function, then compare the ...
5
votes
3answers
371 views

Are there any regulations against financial companies storing passwords in plaintext?

A bank that I use stores my password in cleartext or perhaps using reverisible encryption, which is just as bad. I know this because when you click "Forgot your password?" (or similar) link, it ...
1
vote
3answers
305 views

Logic for generating Strong Password?

I try to encrypt password using MD5 but there are decoders for MD5. So I'm worried about encryption of password for big website. Is there any logical suggestion or step function to generate strong ...
5
votes
2answers
343 views

Can a HSM be used to make password hashing stronger?

Say a database server has a HSM which is in use for encrypting (reversibly of course) credit card numbers. Is there any way a HSM could be used to add strength to a password hashing scheme? (Or are ...
3
votes
4answers
493 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 ...
1
vote
2answers
341 views

Seeking advice on how to build a box to brute force hashes? [closed]

I work in a startup security firm, and I need to build a GPU-based to brute force password/hashes, which can be used to validate password strength and test hashing algorithms. I expect some high ...
1
vote
2answers
129 views

is it appropriate to set restrictions on a user's password? [duplicate]

Possible Duplicate: XKCD #936: Short complex password, or long dictionary passphrase? Im developing a website and am curious as to the current trends in the nature of passwords. Is it good ...
5
votes
3answers
577 views

Trying to understand password hashing

I am trying to get a grasp of password hashing. Back in the days it seemed so simple, just MD5(password + salt) and you are done. Then md5 was proven to have collisions so people started moving to ...
0
votes
0answers
220 views

What is the most secure way to recover password online? [duplicate]

Possible Duplicate: Can anyone provide references for implementing web application self password reset mechanisms properly? I have website which sends generated password to any person who ...
11
votes
3answers
734 views

Does the salt need to be unique or not predictable?

I always thought that salts is simply used to prevent rainbow tables to be used. Other have suggest they should be unique on a per account basis. Currently i have been using a config file to use as ...
15
votes
7answers
678 views

To salt, or not to salt? [duplicate]

Possible Duplicate: Why is using salt more secure? Why would salt not have prevented LinkedIn passwords from getting cracked? Recently I decided that I wanted to learn more about web ...
-2
votes
1answer
435 views

What encryption hash function I should use for password securing? [duplicate]

Possible Duplicate: How to securely hash passwords? What is the best encryption algorithm? MD5, SHA1, SHA2 or maybe something else? Can you explain me why?
25
votes
8answers
9k views

Why Disallow Special Characters In a Password?

The culprit in this case is a particular (and particularly large) bank that does not allow special characters (of any sort) in their passwords: Just [a-Z 1-9]. Is their any valid reason for doing ...
3
votes
2answers
756 views

SASL Authentication Protocol with No Cleartext passwords

As you know, LDAP supports three authentication mechanisms: anonymous, simple and SASL. The first one is only suitable for particular cases, and therefore I'm not going to talk about that. The ...
7
votes
6answers
957 views

Storing password hashes without a correlation to the user account

I read an interesting article about an alternative way to store password hashes ans was rather intrigued. A better way to store password hashes? The primary concept is having a large table full of ...
3
votes
3answers
166 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 ...
0
votes
2answers
911 views

Long Passwords: How are they more secure? [duplicate]

Possible Duplicate: XKCD #936: Short complex password, or long dictionary passphrase? How are long passwords more secure? The only situation in which I can accept long passwords are more ...
23
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 ...
35
votes
9answers
3k views

Why do password strength requirements exist?

Password strength is now everything, and they force you to come up with passwords with digits, special characters, upper-case letters and whatnot. Apart from being a usability nightmare (even I as a ...
5
votes
4answers
2k views

Send new password by email is bad practice but what to do if user forgot his password?

According to http://plaintextoffenders.com/post/7006690494/whats-so-wrong-about-sending-a-new-password-in it's bad so what to do ? Just ask him to set a new one ?
10
votes
2answers
720 views

LastPass application architecture

I'm trying to find details on the application architecture of the Lastpass browser app for Firefox and Chrome. All that seems to be out there is this security analysis: ...
2
votes
3answers
1k views

Why would you do a password audit

I was thinking last night after reading an article about pen testing and security audits, why would you get a list of all the passwords for the company you are auditing and put them through a piece of ...
0
votes
3answers
4k views

Storing passwords online using Gmail documents

Following this discussion about "Online Passwords Managers" I wonder whether it is a good idea to store the passwords using a spreadsheet inside Gmail documents? I mean, it seems to me that these ...
0
votes
1answer
571 views

What's the idea behind requiring users to change password periodically? [duplicate]

Possible Duplicate: How does changing your password every 90 days increase security? Some sites require users to change their password every x days. For example, at least 3 online banking ...
29
votes
8answers
4k views

Why would salt not have prevented LinkedIn passwords from getting cracked?

In this interview posted on Krebs on Security, this question was asked and answered: BK: I’ve heard people say, you know this probably would not have happened if LinkedIn and others had salted ...
4
votes
1answer
2k views

Which cross-platform password managers support encryption using a hardware token?

I am looking for a really secure password manager and I really like the fact that Password Safe supports encryption/decryption using a Yubikey programmed in challenge-response mode. Read more here: ...
8
votes
3answers
3k views

Is LastPass' locally stored One-Time-Password recovery a security problem?

If you forget your LastPass master password then LastPass provides the possibility to recover access to your vault using a One-Time-Password (OTP) which is stored locally but is initially disabled. ...
21
votes
5answers
1k views

Is it possible to increase the cost of BCrypt or PBKDF2 when its already calculated and without the original password?

I just wanted to know if you can increase the cost (iterations) of those two algorithms off-line. I want to increase the cost every year of my users passwords. One solution is to recalculate them ...
17
votes
3answers
9k views

How can I be sure Lastpass really can't access my passwords?

The recent, widely publicized security incident where millions of Linkedin were exposed reminded me to tighten up my password practices. I'm looking at several password managers now and I'm especially ...
12
votes
5answers
3k views

What is a good practical (and sane) way to manage all your passwords for online sites?

I am just a mere mortal that wants to have a somewhat secure way of managing all my passwords. This is something that I have been putting off, but since LinkedIn decided to give away one of my ...
3
votes
5answers
157 views

Are there any academic articles on how people handle their passwords?

Are there any academic articles on how people handle their passwords - how many they use in total, how often they change it, whether they commonly store it somewhere or just remember them and so ...
1
vote
2answers
404 views

How can I create a service that automatically logs onto a third-party service without storing credentials in plain text?

I know that storing log-in credentials in plain text is one of the cardinal no-nos of security, but I'm working on something where I can't think of any other solution. My service connects to a user's ...
6
votes
1answer
3k views

Does NIST really recommend PBKDF2 for password hashing?

We hesitated between BCrypt and PBKDF2 for password hashing. In many forums and blogs people say something like "In their Special Publication SP 800-132 NIST basically recommends using PBKDF2 for ...
4
votes
2answers
172 views

iPhone - logging out user when app goes into background

Our (financial/banking) mobile app requires user to enter username/password in order to get data via webservice calls. Once user is logged in, credentials are stored in global variable until user logs ...
2
votes
0answers
155 views

Lastpass - Can I just keep the previous autofills? [closed]

I just installed the Lastpass Firefox plugin, and it seems like a useful tool thus far. The only thing that drives me crazy is that I am used to the Firefox saved passwords where it will show the last ...
4
votes
6answers
1k views

Password sent via email upon registration

I was wondering what the pros and cons are about sending an email with the password to a user registering on a website (like wordpress.org does). They use pretty good passwords (12 characters long ...
1
vote
2answers
465 views

Using a tabula recta to store passwords

Reading an answer to another question ("Is there a method of generating site-specific passwords which can be executed in my own head?") I came across this link, describing a way to use a physical ...
6
votes
3answers
1k views

Hashing length for storing password

Does larger hash size improve the security? Is it overkill to use 512 bit hash? If I stored only 256 bits of the PBKDF2-SHA512 derived key, is it less, equal or more safe than 256 bits of ...
12
votes
3answers
3k views

Password in file .php

My connection.php file stores the credentials to connect to the database. <?php $objConnect = mysql_connect("localhost","username","password"); mysql_select_db("selectDB", $objConnect); ...
5
votes
3answers
2k views

What are some good ways to verify user identity for password resets?

I'm wondering how others verify the identity of users they're resetting passwords for. We currently try to speak to a manager at work, but it frustrates end users and seems like we don't trust them. ...
13
votes
5answers
1k views

Is there any reason to show the same message for invalid username as password?

I've seen a security question/requirement that a website login return the same error message for invalid password as for non-existent user. The idea being that this it makes it impossible to discover ...
1
vote
1answer
356 views

If password is changed on Active Directory, can I ensure that PC must be restarted before logon with new password

Basically, if I have a Windows computer connected to a domain, how can I ensure that if the password is changed on Active Directory that the computer must be restarted before the new password takes ...
14
votes
11answers
3k views

Best practice for password distribution

I am about to set up a new account on my Linux server for a user that lives in another state in the U.S. I can't think of a good way to get them this user their password. There must be a standard ...
3
votes
3answers
361 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. ...