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

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2
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1answer
178 views

Crackstation “Secure Salted Password” Java example - is it really secure?

I'm making an auth service so I've been looking for some good Java/Groovy implementations of password + salt hashing. I've found this article on crackstation along with a code example and decided to ...
28
votes
5answers
3k views

Are passwords comprised of key sequences on a keyboard any less secure than the same characters but jumbled up?

Here are two passwords: 5678%^&*tyuiTYUI and 8^tyU75%*IuY6T&i Both have the same number of characters and in each the characters are identical, the only difference is that the first ...
1
vote
1answer
42 views

Can a PKCS12 file be distributed over insecure channel?

Is the PKCS12 only as secure as the password protecting private keys ? Can I distribute the p12 file over an insecure channel ?
2
votes
1answer
123 views

Is it a good idea to expire passwords after a time relative to their security?

If a user has to change their password ever so often, is it a good thing to check it against zxcvbn or similar library and assign a expiration date relative to the risk of the hash being cracked?
25
votes
6answers
7k views

Are passwords that are manually typed in really unrecoverable from memory or disk?

As part of an increase in the security measures for our company, we're moving to making sure all password logins (databases, servers, etc), are done through a password prompt and never using stored ...
349
votes
12answers
58k views

What technical reasons are there to have low maximum password lengths?

I have always wondered why so many websites have very firm restrictions on password length (exactly 8 characters, up to 8 characters, etc). These tend to be banks or other sites where I actually care ...
0
votes
1answer
120 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
votes
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 ...
0
votes
2answers
57 views

Is authenticating via the database secure

Sorry for this probably noobish question. So far, I've read password comparison/verification is implicitly understood to be made on the application layer and not in the database. For example in PHP, ...
0
votes
0answers
40 views

I forgot my ZIP file password. How do I bypass the encryption? Which software would work? [duplicate]

Should I use brute-force attacks? Do they even work? What options do I have? I only remember short fragments of the password and it's definitely more than 7 characters long.
0
votes
1answer
354 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
vote
1answer
31 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 ...
0
votes
2answers
74 views

What is the severity if someone read the ConnectionStrings_Prod.config?

I was doing an pen test in a website and the programmer did a big mistake and I was able to read any file. So I read the web.config and see the password for database was in ...
9
votes
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 ...
2
votes
1answer
63 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 ...
7
votes
2answers
227 views

Does password-hashing “busy-work” need to be cryptographically secure

All modern password hashing schemes are deliberately designed to include a huge amount of "busy-work", to limit the speed with which an attacker would be able to conduct password hashing attempts. ...
6
votes
3answers
858 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 ...
4
votes
2answers
109 views

Should password recommendations be different for devices, networks, and internet?

I started using a password manager last year and updated nearly all of my internet accounts to super-strong, unique passwords, and that isn't a problem, cause I only access them from web browsers or ...
4
votes
4answers
241 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
votes
1answer
163 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 ...
3
votes
3answers
579 views

Rainbow Tables: What is the Reduction Used for?

This is a follow up from this answer. The answer is very good, and it put me to thinking and doing some research. I have found another good explanation on this site. At some point, the author says: ...
3
votes
5answers
334 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?
0
votes
1answer
158 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 ...
-1
votes
1answer
14k views

How to get a Network's WIFI Password through CMD? [closed]

I found that Wifi's Password can be retrived using the network and sharing wizard in Windows, And Technicaly theres no way to store Passwords/collection of bytes in the memory after switching/shutting ...
10
votes
3answers
950 views

Should an admin user be able to edit passwords?

For your typical web app, should an admin superuser have the right to edit a user's password, or should only that user have the right? (Even with edit ability, the admin would never see the current ...
0
votes
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 ...
23
votes
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.
5
votes
2answers
295 views

How will security need to be changed if we can crack password hashes in quasi-polynomial time?

If we suppose that we have access to some form of generalized password hacking/cracking that can somehow find an $n$-bit password in time $O(n^{\log n})$, is there need for alarm? This question ...
1
vote
1answer
96 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 ...
0
votes
1answer
110 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 ...
0
votes
1answer
184 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
54 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
votes
1answer
94 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 ...
3
votes
2answers
363 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 ...
1
vote
1answer
68 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 ...
62
votes
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 ...
-3
votes
2answers
57 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 ...
232
votes
7answers
35k views

How to store salt?

Nowadays, if we expect to store user password securely, we need at least do the following thing $pwd=hash(hash($password) + salt) then store $pwd in your system instead of the real password. I have ...
0
votes
1answer
166 views

Can any App Store app access all of my passwords?

Whilst researching another question, I've noticed that on OS X 10.9.4 there are many instances of Library/Keychains/login.keychain from ~ within the Data folder of what looks like apps from Apple App ...
13
votes
7answers
8k views

Forgotten password or reset link, which is more secure to email?

I originally posted this as a reply here in this thread but didn't get much feedback on it, and now I'm curious as to what others think is the best approach, or if there is any difference between the ...
11
votes
2answers
882 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 ...
11
votes
4answers
927 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 ...
1
vote
2answers
95 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 ...
7
votes
4answers
1k views

password complexity policy for non “English” passwords

In an internationalized application, what is the best practice for a policy on complexity of passwords? I am not having luck searching for the answer. Wikipedia lists these items for password ...
7
votes
2answers
2k views

How do I block LinkedIn from extracting data from Microsoft Exchange Server?

LinkedIn now offers the ability to take a real user and password from the end user and connect to Exchange Server for the purpose of importing contacts into their system. (To do this yourself, click ...
1
vote
2answers
272 views

Can Hydra crack a flash-based login?

Is it possible to brute force a flash login with hydra? If not, what is a good tool to pen test a flash login?
10
votes
2answers
667 views

Password generation - too primitive?

A while ago (12 years old), I recognized my passwords weren't safe at all. Because I used the very same password everywhere, some grumpy admin could easily take over all my accounts (he got mail and ...
0
votes
0answers
156 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 ...
2
votes
1answer
1k views

Hydra bruteforce and JSON

I am having problems with Hydra and a JSON payload. The login request (intercepted with Fiddler), is the following: POST http://architectureservice.test.com/api/v1/login HTTP/1.1 Host: ...
3
votes
1answer
195 views

Is it possible to retrieve SSH v2 credentials in a username/password authentication scheme?

I'm currently analysing a compromised network(root access has been gained to a workstation and logs show that it has been used for port scanning and service brute forcing attacks on the remaining ...