Specific to the security of passwords: hashing, entropy, cracking, resets, lockouts, etc.

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1answer
107 views

Can I get rid of storing user secrets by using OpenID, and what do I need to store?

What information do you have to keep about a user to be an OpenID consumer? I want to use OpenID to let users register and authenticate on my system. So while I'm at it I want to not duplicate ...
2
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3answers
1k views

Store password locally. Where? How to pass it securely?

I'm developing an application. The user must enter his credentials which will be sent to the server. If the user opens the application a second time he shouldn't need to enter them again - credentials ...
1
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1answer
30 views

How can I defend against Heroku (or any PAAS) ID theft?

How can I defend against Heroku (or any PAAS) ID theft? Is it correct to assume that if someone obtained my Heroku credentials that they would have access to any data in my app, regardless of any ...
2
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1answer
58 views

Is it sensible to use application password bypassing two factor authentication? [duplicate]

I discovered that some applications (like Sylpheed) seems unable to support two factor authentication. Google has a feature called application passwords - a separate password that "grants complete ...
1
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1answer
87 views

Storing server generated passwords

There are some applications that generate passwords for you. Consider a case where you sign in via Facebook, the application (let's call it NEWAPP) verifies your sign in on the server using FB tokens ...
6
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3answers
826 views

How to encrypt all existing customer passwords [closed]

I work for an online shop and since I worked here we have stored customer passwords in plaintext. I joined the company as a data inputter and when I discovered that we did this I flagged it up with ...
9
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5answers
3k views

Using Google Search results to determine password strength

Google is a repository of Internet data, as it indexes tremendous amount of data. It uses a prediction service to determine the rest of the search query. With such a huge repository in place, can we ...
5
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3answers
154 views

Storing random initial (one-time) passwords in plain text

I manage a vendor app that issues accounts (with passwords, of course) to end users. From what I can see, final user passwords are stored properly. My concern is the initial account generation and ...
0
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1answer
152 views

When bruteforcing a WiFi network password, Can that admin see it?

When bruteforcing a captured packet containing the encrypted password, can the owner/admin of the router see each auth attempt? I'm assuming you just encrypt each passphrase in the dictionary file and ...
0
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1answer
124 views

Brute force attacks detection risks

I would like to ask if using brute force attacks on some websites or online services can be risky in any way for the hacker? Let's say that someone is using medusa tool to crack password on his ...
3
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5answers
306 views

Are all unsalted password hashes inherently insecure?

Maybe I'm missing something obvious... Are all passwords stored in common, unsalted hash algorithms able to be attacked via rainbow tables?
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0answers
24 views

How rainbow table works? [duplicate]

I have roughly understand how a rainbow table works from http://en.wikipedia.org/wiki/Rainbow_table, but I am quite curious why there is a need of different reduction functions for each column for ...
1
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1answer
82 views

Are there best practices concerning application account credentials?

I am looking for best practices concerning application account credentials. For example, suppose I got a corporate application which uses an Active Directory application user account to communicate ...
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4answers
227 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 ...
0
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1answer
128 views

How to use multiple charsets in hashcat

I wanted to use a brute force attack on hashcat but WPA/WPA2 networks are 8-64 characters long and they have multiple possibilities of a password. I was wondering if there was a way to use multiple ...
1
vote
1answer
52 views

How do you practically manage your never-use-personal-accounts-on-a-work-machine-ever double life, when your personal machine is a limited iOS device? [closed]

This is follow-up to Starting a new job after working at home for years. How to best protect data, secrets, and privacy in the workplace? The answer to that question is Follow company security ...
0
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1answer
92 views

Starting a new job after working at home for years. How to best protect data, secrets, and privacy in the workplace?

I have just started interviewing for new computer job after years of working from home. At home I feel very secure with how I protect myself from data loss and keeping my secrets secure. I backup ...
5
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0answers
202 views

Any problems with scrypt yet?

In the question Do any security experts recommend bcrypt for password storage? Thomas Pornin recommends the hashing function scrypt but saying it is "too new to be recommended on a general basis". ...
3
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2answers
338 views

Is fourteen characters long password really weak?

I've tried to sign in to Samsung Cyber Service Center1. Since I'm from Poland, at first I tried Polish version of that service. I have entered a password, that has: 6 numbers in total (in three ...
23
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4answers
3k views

What is the purpose of the “Password minimum age” setting?

What additional security can a "password minimum age" provide? For example: the user can change their password only after 24 hours have elapsed since the last password change.
1
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1answer
64 views

Storing salt and hashed password [duplicate]

Is there a benefit to storing salt appended to hashed password in a single column of a table verses storing salt and hashed password in different columns of the table. The OWASP guide here ...
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2answers
54 views

Can I prevent brute forcing of hashed+salted user passwords without a dedicated validation server? [duplicate]

Salted hashes don't seem to offer any real protection for user passwords by itself. So long as a hacker has a quick way to check if a password is right or wrong, it's trivial to brute force it to view ...
4
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2answers
311 views

Password entry on OS X and keyloggers

There's several places in my ‘personal security infrastructure’ (is there a better phrase for that?) where I find myself typing very important passwords into text-fields on OS X (for instance, ...
11
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4answers
896 views

Does it indicate a bad password system to disallow certain characters in passwords?

When creating an account to the game League of Legends, the user's password must comply to a few rules. The one I'm concerned about is the "Must not contain slashes or spaces" one. The others are ...
11
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2answers
803 views

How can I find out the password hashing schemes used by the specific Unix accounts I log in to?

Every day I ssh in to 3 or 4 independent Unix accounts. I have been regarding them as more or less "equivalently secure" on the grounds that I'm using ssh, but after learning of how much variety ...
6
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1answer
309 views

Security of LastPass' password generator

I currently use LastPass for all of my password generation and management. After reading Diceware, I realized that LastPass' password generator might be insecure, as somebody could potentially ...
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2answers
89 views

What is the evaluation criteria that a site uses for a password as strong , moderate or less secure

I have been in kind of jinx as to how a website decides on which password is highly vulnerable , strong etc . Lately my yahoo account was told to change password which I am using for long time as the ...
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0answers
137 views

THC-Hydra dictionary attack on JSP login form

I am trying to use Hydra to attack a JSP form but I have some confusion. Normally we use command something like this hydra -L list_user -P list_password HOST-ADDRESS http-post-form ...
62
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8answers
7k views

Is forcing users to use a strong password effective?

I am designing a service that would, among other things, store sensitive information. To ensure no unauthorized access of this information, it would be encrypted with a key derived from their password ...
0
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1answer
101 views

Office password protection crack

would just like to have a check on the password protection/encryption of MS office 2007 and above. It is said that its not that easy to crack the password protection except by brute force, since 2007 ...
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0answers
34 views

THC-Hydra - one good pass = shows all valid [duplicate]

As in title. I'm testing my router security and I came up with problem. hydra 192.168.0.1 http-get-form "/:un=^USER^&pw=^PASS^:User Name or Password is incorrect." -L usernames -P passwords ...
0
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1answer
114 views

How to store passwords to a remote web site?

Say I want to build a public API to access a website that doesn't have one. The website is protected by a standard username/password scheme and the API implementation will use scraping to get the data ...
1
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1answer
145 views

Email account password change via email-to-script

I host a mail server (postfix and dovecot) and I wish to set up a password change feature (especially useful when creating a new address provided with a temporary password). Does my scenario has ...
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2answers
122 views

How much do unusual characters in passwords help?

If I use a system that allows all Unicode characters or a similarly large space for passwords, how much would using an unusual character help in practice (for example, ࡀ ,which I found under Mandaic ...
0
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4answers
128 views

Is secondary password (e.g.: pin) necessary?

I find some cases (especially in online games) that a software or website asks users to enter an additional password, such as 4 or 6 digit pin numbers, in addition to their original password. Most of ...
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2answers
97 views

Why do web users still use password manglers though password is sent in ciphertext

There are many variations of password manglers. An example would be Hash( user password + secret key + domain site ) During website login authentication , passwords are sent in ciphertext from ...
3
votes
2answers
125 views

John the Ripper not identifying a password contained in the username?

I have uploaded a screenshot of what exactly is going on, here: http://i.imgur.com/bJSv7C8.png I can see that single-crack mode includes a rule that looks at the username, and "slices" it to identify ...
6
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1answer
247 views

Best Practices for Security Questions

When a website asks me to enter security questions in addition to a password what is best practice on my part? This often happens with banks and other institutions but I see it less with other ...
0
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1answer
324 views

Good password hashing algorithm compatible with PHP and Linux apps

I'm looking for a password hash method for a new server system. The hashes must be generated from PHP code and verified from PHP as well as by a number of applications on a Linux system. I know that ...
1
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1answer
163 views

Best practices for usefully storing two factor authentication backup codes?

For a lot of web services offering two factor authentication, after setting up the system, you are given a short list of backup codes (one-time pads) that are around 7-10 characters long. These are ...
0
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0answers
59 views

Request for Google Password for Calendar Updates

A website that I trust (Delta Airlines) offers a link to add flight information to Google Calendar; that link opens a window asking for my Google login and password. Based on the advice in a similar ...
0
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1answer
128 views

Things to remember while building a password manager [closed]

I want to build a simple password manager for desktop whose sole purpose is to store the passwords that can be read by the user as and when required. I am not considering any fancy features such as ...
0
votes
1answer
109 views

Please help clarify password hashing - salted, multiple iterations of MD5 vs bcrypt/sha2, etc [duplicate]

I was reading an article about the Ars Technica hack here and had a couple of questions. The commenter said: "PHPass uses salted and iterated MD5 to hash passwords" My question is that if I were ...
1
vote
1answer
137 views

Passwords propagation, Password Trend and Word Generator in Human Mind

Some passwords like "123456", "admin" are outrageously popular, so are the leet transformations and concatenation of digits. The users seem to pick up the password suggestions or just copy the ...
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2answers
151 views

guidelines for password managers

I use Lastpass and I'm testing out other password managers in order to set policy for organizational use. Depending on settings, I've found that these programs can automatically send your password ...
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2answers
141 views

How to avoid referer information leakage during password reset

Most password reset systems involve emailing the user a one-time link that lets them reset their password. The token needs to be in the URL, as most email clients do not allow HTML emails to perform ...
2
votes
1answer
242 views

Reverse Engineer this basic Hash using known answer?

Little background: I forgot one of my CCTV accounts password, so used the admin account to create a new one. However I can't access the old one as it's not possible to change a user account password, ...
17
votes
5answers
2k views

Is sending plaintext passwords to a SQL Server database a security risk?

I have a database which has stored procedures which take plaintext passwords. It hashes them and inserts them into the DB. If an attacker has access to the DB connection, it is possible to intercept ...
15
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2answers
904 views

Distance between two passwords

It is known that people reuse their passwords across different sites. The reuse can be done in two ways: using exactly same password for two different sites, slight modifying the password of one ...
9
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2answers
155 views

What concrete parameters can I change to make my passphrase-protected private gpg key more secure

There are several questions which discuss the resistance of passphrase-protected private gpg keys against brute force attacks. It seems, this kind of discussion could go on forever. Rather than ...