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

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4
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1answer
81 views

Are there problems with reusing strong passwords for private gpg keys

I am currently maintaining a few different identities each associated with different gpg keys (for personal, academic, professional correspondence etc., whether or not this is a good idea is probably ...
0
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2answers
164 views

store passwords as one-way-hash, or just use it as an AES key?

I want to store some data so the only one who'll be able to access it is the user itself. Here is my idea: when user registers, his password will be hashed in SHA256 (so it'll fit as an AES key), and ...
6
votes
4answers
389 views

Why is using SQL injection to extract passwords or password hashes from a login database (that should never legitimately disclose them) even possible?

(Okay, so I'll confess upfront that while I'm trying to educate myself the current state of my knowledge on web applications security is still pretty shallow. So I appreciate your patience if the way ...
1
vote
1answer
112 views

How to implement iterations when hashing passwords?

To securely hash passwords, algorithms such as PBKDF2 do many iterations of a common hash such as SHA1. Are there certain ways that these iterations need to be done to be safe? In particular, from ...
1
vote
1answer
97 views

How is github 2FA personal access token more secure than passphrase?

I recently enabled 2-factor authentication (2FA) on my github account. Once you enable 2FA, you can no longer connect to the repo using your normal passphrase using command line tools. You have to ...
1
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1answer
99 views

How does JDBC send passwords to the server?

I am really curious about how JDBC sends passwords to the server. While I understand that is simply an API and it depends on the implementation, are they usually hashed and then sent to server? If I ...
0
votes
1answer
89 views

Windows security & data protection

I work for a hotel. The hotel stores a MySQL database online. This database only contains a Reference ID, number of nights and so on, but no private data. No names, no personal information on guests. ...
5
votes
4answers
247 views

Are bad passwords used to breach security in real life?

I sometimes hear news articles about hackers managing to get a list of usernames/emails and passwords from a given site, and I also hear news articles about how little entropy there is in some people'...
2
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0answers
71 views

How exactly does “Apache Shiro's” hashing work when using a Desktop-Client

I was looking at this question How does storing hash passwords work? and every answer essentially says that Hashing is done via the server, or most of it should, as that is the safest way to do it. ...
3
votes
3answers
119 views

How to transfer a database of usernames and passwords to a friend

Caveat: I basically know nothing about information security, so I apologize in advance. I'll try to keep the question as general as possible. I have a website X over which I have administrator ...
13
votes
1answer
3k views

Should I hash my passwords even if I am only allowed to generate limited traffic?

At this moment I'm busy working on an webapp with a friend of mine. The main problem we have is that we are only allowed to generate 50 GB a month in datatraffic. My question is: Does hashing the ...
36
votes
7answers
7k views

Is it possible to improve brute-force guessing of a password with a picture of the keyboard used to enter it?

Is it a bad idea to post a photo of your keyboard to social media? Can I look at a photo of a keyboard and determine the password of an account? Assuming a certain (set of) password(s) is the most ...
3
votes
1answer
59 views

Purpose of having a identifier on a password reset communication

A particular service I use, when asked for a password reset, showed me an identifier on the website - something like 4562708546, apparently random or sequential. They then sent me a new password over ...
7
votes
5answers
2k views

Why are generated access tokens for APIs much longer than passwords?

I'll take Twitter as an example. On one hand, when registering on Twitter, the password must contain at least 6 characters. On the other hand, access token to the API have about 50 characters: (...
19
votes
5answers
4k views

How to tell if a webapp transmits my password in cleartext?

I am trying to see if a webapp transmit password in some form of cleartext. The problem is that the web app is NOT using https! This is why I wondering is my passwords is sent in clear text. I've ...
33
votes
12answers
9k views

Is it acceptable practice to only increment a number when changing a password?

Note: I'm not asking about this password scheme is the best or not (of course it isn't); I'm asking about its theoretical or practical secureness relative to the optimal password scheme based on the ...
-1
votes
1answer
151 views

How can this encryption algorithm be improved?

I am currently developing an application to store my passwords safely. It will be a proof-of-concept at first, but I am planning to upgrade it later. Anyway, here is how the passwords are accessed: ...
6
votes
2answers
813 views

Is it safe to publish something encrypted with a password if you make it insanely difficult to crack?

Let's say you have a very important private key that you don't want to lose. You think of posting it to http://pastebin.com/ but then relize that elimanates the point. So you think of encrypting with ...
1
vote
2answers
191 views

Advantages with PIN code authentication where the digits are placed at random positions?

I noticed that a lot of high-risk websites, such as bank and payment platforms, do not use a passwords for authentication (as usual) but instead use a PIN code where the numbers are placed at random ...
7
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4answers
408 views

Do hackers still use iterative password cracking techniques?

It's World Password Day! Rejoice, for today is the day that all of our friends will change their passwords from abc123 to 123abc!!! While we're on the topic of passwords, one thing websites do to ...
3
votes
5answers
537 views

How secure is changing or adding a single character in your passphrase?

I'd wager quite a many people are required to periodically change their passwords for certain applications or even at the office. I'd also wager that a large percentage of these people "change" their ...
0
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2answers
92 views

Obfuscate Identity for Password Reset Information

I am just wondering your opinions on why it would/would not be a good idea to mask or obfuscate email address data in a password reset web submission once the user has entered their username informing ...
0
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2answers
97 views

How do data breaches of account login information end up in plaintext?

For example, see this story. Am I missing something here? Are the login details actually still encrypted? I don't understand how it is possible for a data breach of what I assume is encrypted ...
3
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2answers
98 views

For high entropy credentials, is SHA256 hashing good enough?

Let's say I've got a database of high-entropy credentials (e.g. 256-bit random values) used as API keys by clients. I'd like to hash them in my database so that a database compromise doesn't allow an ...
0
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2answers
60 views

Replacing files with infected files on anonymous ftp server

I am creating a new question as i now have another question which was raised from a previous answered question post. What im trying to figure out is would this scenario be possible. I have an ...
0
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2answers
58 views

How to properly hash a key? big vs small digest

We have to roll (decommission) database access keys often, but it's important to know which key each system is using in order to avoid removing a key in use thus creating unavailability. We want each ...
0
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2answers
75 views

Pros and cons of password policy filtering common weak passwords? [duplicate]

We all know the basics "password rules" when a user register on a website, such as: more than 8 characters, must contain an upper case letter, must contain numbers and so on Why don't websites ...
0
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3answers
41 views

How secure is it to use passwords consisting of one common part and one site specific prefix? [duplicate]

One of the greatest problems with passwords is having to remember different passwords for different sites. Some people use password managers, others use the password reset link every time they want to ...
0
votes
0answers
98 views

How to safely pass password reset token from http get request to html page?

I am working on implementing my own custom password reset that sends an email where the user is taking to a page to reset their password. So far I have generated a unique token that gets put in an ...
7
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1answer
127 views

What are the recommended scrypt cost factors for 2016?

I've been trying to look for the answer, but the latest one I found was outdated by three years. So what are the recommended scrypt cost factors for 2016?
63
votes
9answers
11k views

I almost searched my password, but didn't press enter. Is my password at risk, because of autocomplete or anything else?

Without even thinking about it, I typed my password into the Google search bar, but I didn't press enter. Since autocomplete is on, does that mean my password has been logged or indexed somewhere? ...
97
votes
14answers
11k views

Could keystroke timing improve security on a password?

When I was young, and had just started out in my software-development career 20 years ago, I wrote a little bit of code on my Amiga that took a password, but also recorded (within some threshold), the ...
4
votes
1answer
112 views

Spoofing an NTP server to allow bruteforce on any smartphone

We all know that smartphones (i'll take iPhone as an example) rely on SNTP/NTP servers to update a device's time and date. So, by creating an SNTP server that mimics Apple's server, we can actually ...
4
votes
1answer
91 views

How secure is my system for a password reset?

I am using my custom Parse Server with Heroku which I am pretty sure (99%) that it is decently secure using things like oAuth2 and 1 way hashed passwords. The problem is I am trying to implement my ...
0
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0answers
52 views

Does an account with a !! /etc/shadow entry have to still expire?

Currently where I work, our password policy is set at 84 days. This is set in our login.defs on all of our Linux machines. We have policies that are set around PCI DSS 3.1 and the like, this goes for ...
3
votes
1answer
68 views

Is it possible to remove the password on new generations of Lenovo X1?

I have lost the password for my setup. I set it up a few years ago and now I cannot recall it. The supervisor password is not stored in an EEPROM so the usual tricks do not work. I think it is in a ...
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votes
1answer
85 views

What is AES 256 bit encryption? [closed]

I was looking through some apps to store my passwords in on the App Store when I found one that boasted an "AES 256 bit encryption system". Now that sounds all very good and well, but that doesn't ...
2
votes
1answer
138 views

Enter the password outside the password field

If I press Tab twice after enter my username, I will type my password somewhere outside the password field. Are there any chances for somebody to catch my password when I enter it outside the ...
0
votes
1answer
80 views

Passwords processed on server side? [duplicate]

So while I was working on my personal project something struk me. When somebody creates an account on any web service/social media they provide their desired username and password,this is then ...
6
votes
4answers
1k views

Does quick denial tell that you passwords are stored in plain text?

Say you are using a website and incorrectly enter your password. The website then "instantly" pops ups with an "incorrect username/password" message. Would it be safe to infer that the website is ...
-1
votes
1answer
191 views

CRC-96(ZIP) decryption

Is there a way to decrypt CRC-96 encrypted string? I am testing a web application which stores the password in the database in CRC-96 encrypted format.
3
votes
1answer
214 views

How to detect mimikatz usage on LAN

My boss is has made it clear that we need better ways of detecting mimikatz usage on the network- and I would agree. In place already for detection is suricata/ET PRO rule set on a couple of taps. ...
1
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2answers
124 views

memorable word and answers to security questions when resetting password?

Context We have a situation where we are allowing our users to login using either using Username & password + Memorable word OR Username & Password + answer to Security questions depending on ...
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votes
1answer
133 views

How come I can log in on a random webcam with the password “admin”? [closed]

I used http://shodan.io to look for internet-connected webcams. I found one (in Russia), and I managed to succesfully log in to it using admin as the username and admin as the password. How can this ...
4
votes
1answer
81 views

texting password reset link instead of a code

An increasingly common process for assisting with password resets is the application texting a code/token to the user’s verified mobile phone. We have a client which would like to eliminate the need ...
4
votes
4answers
145 views

Sending server-generated password by email

I'm implementing a system where our users need to enter a special (permanent) password to authorise a transaction. The password is separate to their login credentials, and they can only enter this ...
1
vote
1answer
104 views

How to handle password storage for my project?

We have NFC cards to keep track of presence, students scan their card to a terminal at the beginning of every lesson, we want to extend the cards usage to filter out who can access the Raspberry Pi's ...
2
votes
1answer
98 views

Email code authentication

I'd like to replace passwords with a temporary code that's emailed to the user. The login flow would go like this: User enters their email address. "If that email belongs to a user, a code will be ...
4
votes
1answer
142 views

Safely store passwords in specific scenario

I have a specific network environment. Its a DTN(Delay Tolerant Network) network without continous connectivity, situated on the sea, where nodes are ships. There is also a server that is a part of ...
36
votes
4answers
4k views

Avast AV could read Firefox saved passwords

My friend uses Firefox's built-in password manager feature to save passwords for sites. Later, after installing Avast Free Antivirus there was a feature called Passwords on the Avast UI. When accessed ...