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

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7
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2answers
275 views

Odd password scrambling algorithm

I'm researching an application that has password scrambling algorithm that I've not seen before. I generated a few passwords (the max. length allowed is 8 chars), and got the following results: ...
1
vote
2answers
74 views

Is it Safe to Send an Invalid Password Back to the Client?

It is common for websites to remember the username input value after an invalid login attempt but not the password input value. Take SE for instance. When I attempt to login with an invalid password: ...
3
votes
3answers
170 views

Why do so many banks have relatively weak e-banking security? [closed]

I follow a few infosec-related Twitter personalities: Paul Moore, Taylor Swift, Troy Hunt are the main 3. Paul Moore is currently in the process of switching banks, frequently tweeting and retweeting ...
7
votes
8answers
634 views

Password reset with lost email functionality

I have searched and viewed most of the other questions and answers about implementing forgot password functionality on a website. However, we have a unique situation. When a user registers an account ...
1
vote
1answer
44 views

Should I show the security answer when the user goes back to edit the field?

So when a user signs up to create an account, they are required to select select questions and enter security answers. Once they do that, they can proceed forward to a review page that shows them the ...
31
votes
6answers
3k views

Does verifying identity by positions in passwords mean passwords are stored unhashed? [duplicate]

If authentication occurs by asking the user for the characters at certain positions in the password (such as: give the 3rd and 7th character in the password), does this imply that passwords are stored ...
-1
votes
1answer
114 views

Is hashed password safe if salt and key are stored with the hash

I am trying to hash the password using SHA256 with random salt and random key in php and storing back hash value with salt and key used. I want to know does this provide adequate safety? The ...
0
votes
2answers
216 views

Do WiFi passwords remain accessible significantly after logging in?

"... they'll go to the taskbar and look at the properties of the WiFi router to get the password." is a quote from another question on this site, and is in the context of WiFi passwords. The ...
0
votes
0answers
86 views

Line Length Exception in hashcat

I'm very new to cracking a password so sorry if I sound stupid. I am trying to get my admin password from my second PC (I lost it). I did find the SAM file with kali linux and with bkhive and samdump ...
0
votes
1answer
149 views

Saving username and pasword inside SQL

I am currently managing a network of around 100 PCs. Many users have different mails/usernames and passwords for different services like login to PC, mail, local applications, ... When an application ...
-2
votes
1answer
48 views

Make password list with crunch [closed]

I want to make some password list like this : A4B9D It should has these : 5 characters first, third, and fifth characters are letters (A to Z) second and forth characters are numbers (0 to 9) ...
1
vote
3answers
76 views

What are the disadvantages of combining client-side and server-side authentication security?

Imagine situation: Application might or might not be run via SSL/TLS Application should not know password of the client because client might reuse passwords Wouldn't then combined client-side and ...
3
votes
2answers
68 views

Assuming proper creation, encryption, and storage, how is a breach/leak of a hash worriesome?

Let's say I create a pseudo-random password that is secure (24 alhpa numeric, upper lower, special chars...) for a system (say a password manager). Let's assume the password manager encrypts and ...
1
vote
1answer
393 views

What happens if an attacker steals my phone's IMEI number?

I have some questions regarding IMEI numbers and data and identity theft. While searching online I have found many conflicting answers regarding this topic and would like some clarification if ...
2
votes
3answers
158 views

How secure are “pattern” passwords?

I was watching a TED Talk about password security recently which covers quite a few different types of passwords and compares how secure they are and how easy they can be remembered. One type of ...
2
votes
2answers
59 views

Justifying strong 1st factor in the context of multi factor authentication — beyond passwords

I am wondering if you need strong 1st factor (for theoretical correctness, please note it is the knowledge factor -- not necessarily a password, but definitely also includes strong passwords)? What ...
2
votes
0answers
46 views

What technologies does ChromeOS use to secure saved passwords?

I have read that Chrome will use the system's native credential tools to manage saved passwords (e.g. KeyChain on OSX, libsecret on Linux/GNOME etc). Does anyone know what tools are used on ChromeOS? ...
4
votes
1answer
71 views

Desktop Flickers Past Lock Screen

I'm using Fedora 22 with Gnome 3. I have a password set for my user account, so when my laptop awakens from sleep, I am presented with the lock screen and must enter my password before getting to my ...
1
vote
1answer
26 views

Authentication between to devices where the same password is used on both

I'm writing two applications that are intended for execution on two separate devices. It is similar to a remote desktop solution such as TeamViewer. What follows below is my proposal for an ...
2
votes
1answer
147 views

Security behind “Windows Security” Feature

Within the Windows Security authentication mechanism active, there are cases the user-login popup comes up. Are this username and password sent encrypted or they are sent as plain-text as the ...
20
votes
4answers
3k views

How is Gmail susceptible to brute-force attacks?

In the Atlantic article "Hacked!" it says: My wife’s password was judged as “strong” when she first chose it for use with Gmail. But it was a combination of two short English words followed by ...
2
votes
2answers
152 views

Understanding salted password hashing using Java

Context: I am using this tutorial and trying to understand and implement salted password hashing using Java. After spending some time on this topic, I figured out that the basic idea is to: Convert ...
0
votes
1answer
61 views

Old phone as secure credential storage device

Can an old android phone (with sim card removed) be securely used as an OFFLINE storage device for password, user id's and acct numbers?
1
vote
2answers
97 views

I forgot my 7z password [closed]

I used 7zip to encrypt a 200mb archive of my code used a combination of some of 7 possible words and no numbers or caps. So 823543 possible passwords. What is the best free program I can use to ...
-5
votes
1answer
66 views

How to use wordlist [closed]

I have downloaded a wordlist from https://crackstation.net/buy-crackstation-wordlist-password-cracking-dictionary.htm The size of the wordlist is 4.2 GiB (compressed) or 15 GiB (uncompressed) The ...
1
vote
3answers
71 views

Potential collision with hash password

Normally, the password size is fixed by the hash function in which the password is given right ? Because otherwise, if the password size is bigger than the hash result size, there should be potential ...
0
votes
2answers
199 views

Are passwords in Mozilla products stored insecurely?

I have just downloaded a Polish program Passtool Password Reader (written by Rafał Jelitto), unpacked it from .rar archive and run it. I have hit the bottom-left button (Pokaż wszystko) and this small ...
44
votes
5answers
9k views

How can I know that developers will be ethical and not record my password in plaintext

I am not asking why hashing should be done. Instead, I want to know how to prevent that developers record user passwords to hack their user's other accounts, especially their email. Couldn't they ...
1
vote
3answers
87 views

Why is there a preference towards long passphrases instead of increasing the hashing iterations?

There seems to be an agreement that when it comes to offline password brute-forcing, long but simple passwords are better than short complex ones. I recently saw a question related to increasing the ...
0
votes
0answers
49 views

Hashed master password and generated encryption key in a password manager program

I'm writing a WPF password manager application to practice programming, so far this is the scheme I intend to use to store master password and individual site password: Master password: Generate a ...
2
votes
2answers
71 views

Enabling feature to log in as soon as right password is typed (without pressing enter)

My phone has an option for the PIN lock screen to unlock it as soon as the correct number is entered (without pressing enter). So for example if the password is 77912 then you only have to enter 77912 ...
1
vote
2answers
154 views

“Sniffing” Wifi Password? [duplicate]

I wonder if the follwing is possible: Assume you want to gain access to the AP "ap". Isn't it possible to set up a hotspot with the same BSSID, so that clients think that you are ap and send the ...
2
votes
1answer
89 views

Should you be able to reset a password without verifying the email address first?

I just noticed with Instagram, what you can do is: From the logged in Instagram app, change your email address. This will send a verification link to the new email address. Verifiying the email ...
5
votes
1answer
160 views

How secure is CertiVox M-PIN?

CertiVox have designed a system with the aim of "getting rid of passwords". Essentially the system authenticates users with two factors of authentication: A 4 digit PIN and a token stored within the ...
4
votes
1answer
84 views

How can I delete a password and lock the account in one step?

I have a minimal server install on a remote machine with a root password set to a temporary, but chosen, value. I have added a separate administrator user. This user has an authorized key for SSH, no ...
0
votes
1answer
98 views

What can I do if someone is using my IP address? [closed]

Another device in my network is using my IP address, what can he do if he is using my IP address? Is this a crime? Can him be caught by police or sue by Malaysia government?
3
votes
4answers
138 views

Are there any two way + two factor authentication systems in use?

My bank, Google etc. use two factor systems where they send me a One Time Password via out of band means. e.g. SMS or an App on my Cellphone or a standalone RSA token generator. This seems good ...
1
vote
1answer
121 views

Password management: how an administrator should reset password for a user?

I implement simple user management. How an administrator should reset password for a user? Just provide a new password for a user (as in Active Directory)? Is it secure enough? Added Is it secure ...
9
votes
3answers
1k views

How secure are sha256 + salt hashes for password storage [duplicate]

I started reading about password hashing recently on multiple sites like this page on crackstation and others, and for what I have understood, I should avoid using hashing algorithms like md5 and sha1 ...
1
vote
1answer
75 views

Is it worth it to implement both SHA2 and SHA3 at the same time?

I'm creating a password storage system for a web server I'm building for fun. Would it be more secure for me to use both SHA2 and SHA3 for hashing, and then store them in a database? If I use both ...
2
votes
0answers
27 views

General Entropy as opposed to Password Entropy [duplicate]

I know that the formula for the entropy of a message is: (I believe b can be set to 2) but when calculating the entropy of a password websites usually only compute log2(p-1), ignoring the first ...
1
vote
1answer
72 views

Give Someone Access to Secure Website? [closed]

I have someone I hired on a Freelancing website working for me - so far he has worked for me for about two weeks and is doing a good job. In order for him to complete his work he will need access to ...
1
vote
3answers
219 views

Why do banks still hack-up autocomplete=off functionality?

With Bug #1025703 in the latest Firefox 38, Mozilla has finally decided to stand up for its users instead of catering to the banks that don't want the passwords remembered. However, I've noticed ...
6
votes
1answer
1k views

How does an attacker know when he has the password?

An attacker gets a list of hashed passwords. How does he know when he has cracked the password(s)? He can't try millions of times on the comprised account. Attacker gets hashed password. How does he ...
3
votes
3answers
145 views

Would requiring multiple passwords enhance security?

I assume that it was considered at one point, and that there's a good reason for not doing it, I'm just curious as to why. I'm sure that there are many people who struggle to remember a single ...
0
votes
1answer
324 views

How can American Express Serve login be PCI-DSS compliant?

Today I went to log into my American Express Serve account at https://secure.serve.com/ and accidentally discovered what appears to be a huge hole in their login process. Here are the steps involved: ...
1
vote
1answer
87 views

how to get cookies from aspx site to use it with hydra

I've been playing around with Hydra and .aspx site and I've hit a bit of a snag - Hydra responds letting me know that the first 16 passwords in my password list are correct when none of them are. ...
1
vote
1answer
118 views

Windows Passwords

What are the security concerns of the following user account setups on a normal Windows 7/8/10 desktop machine compared to: Using a non-privileged account with a password and having an admin account ...
0
votes
1answer
47 views

QR-code based credential retrieval?

This is a sort of design review question that I'm hoping is suitable for this site. I am designing a system that uses a cloud service to establish a secure connection between a PC and a mobile ...
2
votes
2answers
127 views

Why is “\000” added to the end of passwords prior to hashing with bcrypt?

I am implementing bcrypt for java as found here. Before the actual hash takes place, line 455 of this implementation takes the raw String password, and transforms it into a byte array like so: ...