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

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4
votes
3answers
318 views

Encrypted files storage. How to simplify the password management scheme?

It's probably dublicate but I can't figure out the correct keywords for search. You can help by just telling me those words, I'm rather good with Google :) I want to develop somewhat like file ...
43
votes
8answers
64k views

Where can I find good dictionaries for dictionary attacks?

I’m wondering where I can find good collections of dictionaries which can be used for dictionary attacks? I've found some through Google, but I’m interested in hearing about where you get your ...
27
votes
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 ...
45
votes
7answers
2k views

Is it OK to tell your password to your company's sysadmin?

I'm working in a small company (20 employees) as a senior software engineer. After having problems with my email, our newly employed IT administrator asked me to write my user password to someone in ...
-2
votes
1answer
534 views

LophtCrack version 6.0.12 is not auditing my Administrator password [closed]

I am using LophtCrack on my Windows 8 OS. I was testing my password strength and the problem I am seeing it is not working. It doesn't reveal my Admin password, I've run the process for half an hour. ...
3
votes
3answers
853 views

Avoiding Brute Force Attacks in a Web Based Login Form

My login form uses Ajax so it doesn't need to reload if the password is wrong. A PHP script process the request and creates the session if the credentials are right. My idea is to have the PHP script ...
8
votes
4answers
634 views

How dangerous is it to store password in plain text on sites like GitHub?

I have a few private repositories set up on GitHub for some of the projects I am working on for my company. These applications connect to databases and I have database authentication credentials ...
9
votes
2answers
3k views

Is it safe to store the password hash in a cookie and use it for “remember-me” login?

I want to store an encrypted string of the password hash in a cookie and use the hash to lookup the user and log them in (if they want to be remembered). Is this safe? The password is one-way hashed ...
-3
votes
1answer
281 views

Retrieve Admin Password from router [closed]

There is a way to retrieve a router admin password without hard reset? I'm loggen on LAN and know username and local ip address... TKS
3
votes
3answers
151 views

Are there implementations of password hashing algorithms for major frameworks that utilizes specialized hardware like GPUs/FPGAs?

It is common knowledge that password cracking attempts can greatly benefit from specialized hardware such as large clusters of GPUs or FPGAs. Are there any implementations of the commonly recommended ...
2
votes
1answer
427 views

What are realistic rates for brute force hashing?

I'm trying to gauge password strength assuming that the attacker has a hash of my password. Can anyone cite some realistic contemporary rates at which someone could perform various hashes? I know most ...
10
votes
2answers
807 views

Can a Firefox add-on or plug-in access the user's websites' saved passwords in decrypted mode?

Going deeper into the previous question on Firefox plugins and add-ons malware risks: Could a Firefox add-on potentially decode and capture the encrypted websites' passwords saved in the browser?
6
votes
2answers
1k 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 ...
0
votes
1answer
286 views

How to encrypt files without giving the user access? [duplicate]

I don't know if I should ask this question on security.SE or stackoverflow, so please move my post if necessary. I want to store my (C#) application data in a way that the user cannot read or modify ...
2
votes
1answer
2k views

How can I decrypt traffic on a WEP encrypted network?

Let's say that I am connected to a WEP Access Point and I want to sniff all wireless traffic inside that network. How can I decrypt the traffic even though I don't have the cryptographic key? I found ...
2
votes
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 ...
8
votes
3answers
318 views

Does setting a user password on Windows XP help protect against remote exploits compared to no password?

In a typical home user situation with a PC connected to the internet via a router, suppose we are not concerned with protecting the machine from people with physical access. Does setting a password on ...
1
vote
3answers
113 views

How to protect against an attack where a person claims to be in a position of authority?

In an office if a person approaches an employee and claims to be a new IT staff and to give them access to their computer, what can prevent this kind of attack? I've worked a couple tech support jobs ...
2
votes
1answer
371 views

Can I check if a work colleague logged into my user account on a shared computer?

I think that someone at work has logged onto my user account when I'm not in work and moved some files from my desk top to my work in progress. Can this happen? They may know my user name as this is ...
3
votes
2answers
163 views

Server checking client's password without ever coming into possession of it

tl;dr: I am wondering what the best way is to check a password when the client does not trust the server. I know of two common ways servers can check if a user's password is correct: The server ...
4
votes
2answers
535 views

What are the security implications of using TOTP for single factor authentication?

(Note: I am not actually planning to do this. This question is strictly theoretical.) TOTP is commonly used as the second factor in Two Factor Authentication. It is an open standard with available ...
3
votes
2answers
205 views

How can I create a secure password?

I know the standard tricks, create a long password, numbers, symbols, capital letters, etc. My questions is how do I judge password security. I heard different tricks to make secure passwords. For ...
-1
votes
1answer
183 views

After salting my passwords, are they protected against dictionary attacks? [duplicate]

I use sha1() to hash my users passwords, but recently a friend told me that if someone get the hash then they could use dictionary attack and he recommended using salts. I implemented a random salt ...
7
votes
1answer
762 views

Working out how to decrypt encrypted string when knowing the plain text

I have access to a system which I have been asked to create a data export routine for. However, the address details are encrypted and the original sourcecode/password are lost. However, I am able to ...
-1
votes
1answer
154 views

How can I encrypt my router admin page login session? [closed]

I login to my router using the web connection but the session is not encrypted, is there a third party way to encrypt the web session so no one on my network can sniff the password?
0
votes
0answers
45 views

How can I recover the password of a TrueCrypt vlume? [duplicate]

I am trying to recover the password of a trucrypt volume. It is composed by a combination of 4 words (one invented). I remember 3 of them but not their order. Do you know any tools that cold help me ...
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 ...
1
vote
2answers
104 views

How to manage company passwords when employing temporary freelancers?

I am from a marketing firm which now has a development team, which i am part of. We have been tasked with finding a few freelancers who can come in and work when either me and the other developer is ...
7
votes
3answers
506 views

Can cloud based password managing services be trusted?

I'm a big time user of cloud based password managing services like LastPass. But in the light of recent revelations like various government backdoors in popular sites, programs like prism, etc. I'm ...
50
votes
5answers
10k views

Is sending password to user email secure?

How secure is sending passwords through email to a user, since email isn't secured by HTTPS. What is the best way to secure it? Should i use encryption?
-4
votes
1answer
396 views

Feasibility of brute-force on online password [closed]

I am familiar with how offline brute-force attacks work. But for online accounts, assuming no social engineering, how feasible is it to brute-force attack a password? For example, is this dependent ...
4
votes
4answers
226 views

Composition of passwords

Passwords (passphrases) that are taken from known texts (books etc.) are commonly considered to be weak, but what if they are employed in combination with random stuffs, i.e. in forms of AX, XA or ...
2
votes
2answers
737 views

What exactly is 'single' mode in John the Ripper doing?

I'm testing out John the Ripper (1.7.9 Jumbo 7) on a file containing MD5 hashes without any usernames. I've been experimenting with different rules and configurations – I am currently using a wordlist ...
0
votes
2answers
2k views

Where is my password stored on Linux? [duplicate]

Is there a specific location where the passwords are stored ? Is it depending on which version is used ? Are they salted ?
6
votes
3answers
670 views

Can I spoof IP addresses when attempting to brute force a login?

I am testing my website with hydra brute-force software. But accessing my apache conf remote server file, it seems that an attacker can't log-in more a limited number of times per seconds. Does hydra ...
5
votes
1answer
2k views

Where is my password stored on Windows 7?

Is there a specific location where the passwords are stored ? Are they salted ?
5
votes
3answers
2k views

Is it safe to store password in HTML5 sessionStorage?

I am trying to improve the user experience on registration by not requiring the user to retype their password if validation on other fields fail. There are a few ways to implement this, example using ...
0
votes
2answers
942 views

Is user password in ubuntu 13.04 in plain text?

Is it stored in plain text or not? Where can I find the file that contains the username and password for my accounts in Ubuntu 13.04?
16
votes
3answers
5k views

Router password vs MAC filtering?

I just bought a Galaxy S4, and it didn't connect to the WIFI in my house (I have a 14$ router). After a bit of testing, I've decided to leave my connection open without a password, but added the ...
6
votes
5answers
461 views

Is including a secret GUID in an URL Security Through Obscurity?

I know that this question is a little bit on the side of Opinion/Discussion, but I think there's a provable answer to it. I think the common view of "Security Through Obscurity" is that the security ...
5
votes
2answers
126 views

Is it common for a One-Time-Password system to become unsynchronized?

One-Time Passwords look like they can play a helpful role in a layered-security system, yet their use, especially paper-based TANs seem like clients could be vulnerable to getting out of sync with the ...
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 ...
0
votes
2answers
703 views

Why store the password salt instead of generating it? [duplicate]

So, reading through this article: http://crackstation.net/hashing-security.htm it says that storing the salt is fine in plain text because it renders the lookup/rainbow tables ineffective. I get that, ...
4
votes
3answers
220 views

Is it worth padding passwords?

I'm using phpass (bcrypt) to hash the password and SSL when it's transmitted, and using PDO (with PHP) to stop injections, is it worth padding the password, so that if the user enters "123456" as the ...
8
votes
5answers
521 views

Is there any good reason not to salt/hash passwords you store?

Two organisations I frequently deal with (including my bank) ask me my password to authenticate myself with them... well... they ask for "random" characters from my password. As I understand it, this ...
4
votes
1answer
274 views

WPA2 audit tool

For the purposes of my own research, I have a very modest budget to set up a modest WPA2 brute-forcer supported by GPU(s). I've done some homework: Brute-Force GPU Password Crackers How to setup ...
21
votes
5answers
2k views

How can I choose a strong password that is easy use on a smartphone?

Typing on a smartphone is tedious. Special characters are the hardest; lowercase letters are generally the easiest. But even a long all-letter passphrase like "correct horse battery staple" is ...
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 ...
18
votes
2answers
2k views

Sending temp password when users first registered - is that good for anything?

One of our clients has sent us a list of security requirements. One of them was that registration does not including setting a password - once complete, a temp password is sent to the user, and the ...
3
votes
3answers
9k views

Windows 7 Password Hash Security

I recently came across a number of sources that suggest that cracking Windows user account passwords is easy by examining their password hashes. I understand that these hashes are stored in the SAM ...