Questions tagged [passwords]

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

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Has anyone used BreachDirectory? [closed]

I've seen a lot of large recent data breaches such as Cit0Day.in, which are collections from various places so just knowing that my email or username was contained in the breach (the info that ...
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Isn't this kind of password ultimately secure and insanely easy to remember? [duplicate]

Pick any dictionary word. Think of a number over 10 and below 20. Repeat the word as many times as the number, and end off with the same number (for example, "12"). Example: ...
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Allowing a password reset if an account is locked

Similar to another question about keeping an account locked, is it preferable to allow a user to reset their password while the account is locked out due to the wrong password being used too many ...
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Someone hacked my phone how do i protect it [closed]

I fell asleep at a youth center the other night and someone went through my pockets. I woke up and my phones acting weird. I think they copied my phones information and did something to sim card ...
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1answer
100 views

Password cracking using Quantum Computers

Suppose that I have a password that is n-digits long. Each digit can take m values. So the number of permutations will be m^n. I wanted to know how much time it would take a quantum computer to crack ...
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How password_hash / password_verify can work with any arguments (PHP)

I already know how to use password_verify and password_hash functions, but I don't really understand how they work. When I use them I do something like that: $save_hash = password_hash( $password, ...
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Maximum password length for user accounts on Ubuntu

I have a VPS hosted at a remote location. Obviously the host can login directly (without SSH or any keys) on this box and I want to make brute force password guessing as hard as possible for a bad ...
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Why do password requirements exist while limiting the upper character count? [duplicate]

I do not quite understand why it is common practice to require a difficult to remember password with alphanumeric and special character requirements, while also having an upper limit of 32 characters. ...
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Which config files in a linux install contain passwords or other secrets? [closed]

I'm trying to build a list of configuration files that store secrets in Linux. By secrets I mean files that contains passwords, database string connection, hashes etc. The most notable example is, of ...
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Encrypt an sqlite3 database using python [migrated]

I am trying to create a password manager, I have successfully been able to create the encryption key by using a key derivation function on the master-password using PBKDF2 and SHA256. The passwords ...
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Are my browser's stored passwords safe when my Windows 10 User Account has no password? [closed]

From what I've learnt, most browsers which allow you to save passwords for particular forms and websites (e. g. Google Chrome and Chromium-based web-browsers), encode password based on your Windows ...
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How to assess security of Argon2 parameters [duplicate]

I would like to hash user password with Argon2id, then use this hash as ECDSA private key. I made some tests with Python and passlib.hash and found following parameters: memory: 32 MB iterations: 100 ...
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Can your internet provider monitor your data (passwords, etc?)

Was typing in my password into an HTTPS website when I started to wonder if my home WiFi (whether a neighbor could have hacked into and monitoring it) is secure. When I type in Username123 Password123 ...
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Why do administrators create passwords vulnerable to kerberoasting? [closed]

I was researching a kerberoasting attack on the Active Directory domain. To create the stand, I used a Domain Controller on Windows Server 2016 and one client machine on Windows 10. SQL Server was ...
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Alternatives for sending plaintext password while login

Note: I've already read Is it ok to send plain-text password over HTTPS? and https security - should password be hashed server-side or client-side?, but here it's about a specific replacement method (...
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Is there a better method that this for storing a physical password? [duplicate]

This may be a little unnecessary, but taking into consideration: There are many ways to hack a computer There are many ways to hack a network There is always a possibility of an undetected malware on ...
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Problem understanding salting

I'm a beginner in Information Security and am learning about salting. Unfortunately, most of the time I have to learn by myself since the lecturer doesn't provide deep explanation on these. I now have ...
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Hydra only executes one try per task then hangs

As in the title, hydra will only execute one try per task before hanging. $ hydra -l admin -P /usr/share/wordlists/wfuzz/general/common.txt -u 10.10.68.141 http-post-form "/admin:user=^USER^&...
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Why does it take longer for my computer to recognize a wrong password than a correct one when logging in?

When I enter the right password to log in to my computer*, I am in instantly. However, if I mistype it, there is around a 2 second pause. Are there significantly more computations taking place to ...
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Can password managers read my secure data? If no, how does sharing work under the hood?

All the popular password managers on the market advertise that they have AES-256 grade security. In a nutshell, the user has the master key and the password manager has the cipher-text. So the ...
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Good use of libsodium?

I am looking to hash user passwords to store in a database that will likely reside on a user's intranet, so I am expecting the database to be classed as open and insecure. I am using libsodium 1.0.18 ...
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When passwords of a website leak, are all leaked passwords equally easy to read?

As far as I know, when passwords from a website leak, they leak in an encrypted form. Are all those passwords equally easy to decrypt? My hunch is that a 10-character-long password maybe gets ...
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Recommended length for WPA-2 password in 2020

I'm auditing my network setup and trying to determine an appropriate password length with a random set of digits and numbers. I found a Security Stack exchange answer but it was written in 2012 and ...
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Don't one-time recovery codes for 2FA introduce a backdoor?

Although using multi-factor authentication is clearly a good move, I'm struggling with the 'one-time recovery codes' concept. It seems to me that if you choose to use them, what you're doing is ...
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60 views

It is common for an account to be locked after X amount of failed logins, what are the best practice of selecting x?

To my understanding, it is common security practice to lock the account after X failed login attempts in N minute. Usually, the account will be locked for M minutes. I noticed that most of the time X ...
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108 views

What happens if you forget your 1Password password?

When using a service like 1Password, what happens if you forget or lose your master password? My guess is that you can simply reset your passwords on all the sites 1password remembered for you, but I ...
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1answer
57 views

Is a QR code with a secret URL that changes every 5th minute secure?

I need to verify that survey respondents are in the same physical room or video chat (to prevent industry espionage). The respondents can join by scanning a QR-code that opens a URL which embeds a ...
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78 views

Is there any secure method to have recoverable passwords?

I have a local application that normally authenticates against a remote Active Directory server. If the local host loses network connectivity, a special local account becomes available for login. ...
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142 views

Is my login script secure – how to improve it?

I have a login system for my website that works as follows: In the database I have a table called users with the fields user, password and authentication_token. user gets set manually by request in ...
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126 views

On a single user laptop does it make sense to have a separte password for root and the user?

I have a laptop on which I'm the only user. While installing the laptop I was wondering why I should choose a different password for the root account and user account. My reasoning is: The change of ...
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Storing account data on device

I am trying to make an app that allows the user to connect to a service through an API I am also developing. All passwords and account data are securely stored on the server. However, how should I ...
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54 views

How do sites detect credential sniffing, and what is the purpose of this attack?

I just got an email from the Unsplash service telling me that someone had logged into my account via credential sniffing: Five minutes later I get three more emails, each one notifying that a (...
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5answers
239 views

Owner vs IT employee. Security and passwords

I own a company that has hired an IT employee. He has all passwords to servers, work stations and data. He is refusing to share or supply these passwords (Keys to the Kingdom) on the grounds of ...
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Strange cyrus/imaps Logins without valid password

I found apparently successful logins from a foreign ip-address to our cyrus-imap server: Nov 24 08:16:20 server-1 cyrus/imaps[12101]: starttls: TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (256/256 bits ...
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2answers
97 views

Is it possible to find a zip password if it is being generated locally?

I have a program that generates a zip file with a password. Is it possible to determine the password if you analyse the program as it is being run? Would calls to function libraries show the password ...
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5k views

Are algorithmically-generated personal passwords a security risk?

We all know why password reuse is bad: eventually some site at which you have an account that did not properly hash+salt user passwords will get hacked, and your password will be published in a big ...
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1answer
50 views

Is client-side hashing secure during password creation when verification is still done server-side?

Trying to do this to distribute the work of creating a lot of users in which their passwords are hashed. This will cause the server to do a very large amount of work. The idea is this: (Assume ...
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68 views

What is the minimum secure length for gpg -c file.txt?

I want to use gpg -c with a user-generated password that I can easily remember. Are 16 characters enough? for example would a password similar to "I own 32 houses." be bruteforcable?
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44 views

Difference between access control systems that can/can't be compromised without valid credentials?

Take the following examples: When I run sshd, it can in theory grant access to anything that the process itself has access to, regardless of provided credentials. For example, I could in theory ...
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75 views

Concatenating secure and reused passwords

Would concatenating (i.e. joining together into one string of text) a secure (i.e. Diceware) password and other, much less random, passwords be a good idea? This new password would be used as master ...
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Does complexity of salt in password hashing matter?

I have no cyber security knowledge whatsoever, and am trying to safely store passwords in a database. I understood I need to use salt, to avoid rainbow table attacks and to make sure two users with ...
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Found out that a paid VPN service emails plaintext passwords [duplicate]

I recently found out that a VPN service does not hash their customer passwords and I need professional insight on how to deal with this. Here's how I found out: Bought a subscription on the wrong ...
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Is it reasonable to type a bank password in a phone call to the bank? [duplicate]

Recently my friend called their bank (via a normal phone call) to perform an operation with her account and she had to type her password during the call. Everything worked fine, the operation was done ...
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115 views

Using Google Docs to share passwords

Background Often developers and clients need to exchange passwords to be able to access some services. Of course the best option would be to never use someone else's credentials to log in, and instead ...
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67 views

How is Firefox importing credentials from other browsers without the need for the admin password?

Im currently looking into the security of different browser password storing mechanisms. My main focus lies on the new Chromium based Microsoft Edge browser. As far as I can see, Chromium based ...
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1answer
112 views

Can I consider files compressed with password safe at all?

A follow up to my 7,5 years old question. Back 10-15 years ago, when I wanted to send an executable file over Gmail from my PC, all I had to do was to change file's extension to some meaningless one ...
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34 views

Password leak to malicious AP with the same SSID [duplicate]

I was just surprised to find out that devices when connecting to WiFi networks compare the SSID to known ones and try the saved password. In other terms: I have replaced my home router, and my device ...
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1answer
84 views

Can I use the same password for my Computer, Mobile and Password Manager?

I am considering using the same password for my Computer, Mobile and Password Manager. The premise of the "password reusing is bad" rule is that if one website leak the password then all of ...
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1answer
74 views

Is typing the PPP password in the PPP username a risk?

I went to my router admin page where first you need to type in the router's admin and password. I am not talking about that. I am talking about PPP account and password (separate from router's ...
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Making custom wordlists for languages besides English

I'm testing a site whose audience doesn't usually have English as their main language. When it comes to non-English, I consider there to be 3 groups The target language's alphabet is a subset of the ...

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