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

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533 views

What is the right way to implement Keyed Password Hashing?

As mentioned in this wonderful link, the way to get a PBKDF2 Hash of a user given password given a password (of course), a salt (generated Cryptographically Secure Random Number Generator. iteration ...
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1answer
165 views

How to handle legacy website account login credentials

I have a lot (>1000) of credentials for website logins in my Chrome's password safe. Some of them are quite old (> 10 years) and have weak (dictionary) passwords. Some of the accounts have low value ...
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2k views

Hydra sometimes fails against my own router known password

Hydra sometimes fails against my own router known password. Sometimes confirms it was found, and sometimes returns unusual error code (empty). What does this means? dione@saturno:~/misc$ hydra -l ...
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75 views

Gnome-keyring iteration count location

I know that Gnome-keyring hashes the master password between 1000 and 2000 times. It picks a random number. I would like to ask where it saves this number, what is the location of that file? As far as ...
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2answers
220 views

Is it possible to find CryptoKey from orginal password and hashed password?

WebsitePanel is a windows hosting control panel that uses a CryptoKey to hash passwords into the databases. We have lost WebsitePanel config file and lost CryptoKey. We have to reinstall WebsitePanel ...
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284 views

Should I NOT choose a password of max allowable character length?

Q: Suppose an attacker knows the max allowable character length, n, for a website's passwords. Would it be smart for them to attack passwords of length n BEFORE length n - k (where k is small portion ...
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104 views

how to rememeber passwords securely?

Imagine you have a private RSA-key on your computer encrypted (through PBKDF2, AES-CTR, HMAC256) with a password, now if the user would like to tick "Remember Password", what is the most secure way to ...
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1answer
159 views

Storing encryption passphrases in memory in Dalvik?

Given KeePassDroid, I'm considering some of the security implications of accessing KeePass databases on an Android device. In the native applications for Windows, OSX, and Linux, whenever the ...
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154 views

Should a Mobile app able to check what password is locally saved via a user facing feature?

I'm working at a company who is currently working to secure their mobile app (iOS native) by adding check points to security sensitive screens on the device (data is stored in the iOS keychain). User ...
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2answers
132 views

Forced to use using 2-Step Authentication to keep online profiles safe?

I am starting to see a majority of services, websites, and social networks offering the 2-step Authentication like crazy now to protect their users. Also, after reading how the Twitter Account N was ...
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349 views

how to use hash passwords to retrieve keys from keystore or access database

How do I hash the password for a keystore? How do I then use the hash to retrieve something from keystore? Similarly, how do I use a hashed password for accessing the database? I have encrypted the ...
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185 views

Cracking encrypted SQB databases

I've recovered a .SQB SQL database backup file from a backup server and do not have the password. As I do not have the password available to me, I'm looking to determine what type of encryption is ...
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265 views

I login to Stackoverflow (vulnerable) with Google (not vulnerable). Do I need to change my password? [duplicate]

According to this heartbleed mass test, Stack Overflow is vulnerable whereas google is not. I use my Google ID to logon to Stack Overflow (and some other sites). Do I need to change my password? In ...
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2answers
462 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?
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1answer
218 views

Is it a good idea to give users an additional password that they do not control?

It's a given that users will choose bad passwords. Why not help them out? Using a securely-random choice from a large dictionary, choose one or two words and tell the user to write them down. When ...
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226 views

Is it posible to bypass BIOS password without owner knowing later on?

My laptop BIOS is password protected. Probably the password can be bypassed using some hardware and software means. But is it possible that somebody having access to laptop but not knowing the ...
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1answer
234 views

How to safely use a Key Derivation Function to secure private data - need guidance

I have some secure data created in my client app which I wish to store on the server as backup for the user. The user already has a password to authenticate with the server. The password is never ...
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2answers
289 views

Authorization in offline application

I'm working on a machine which needs to store usernames and passwords for the various operators, technicians, and engineers that may be using and configuring it. It is important that some functions be ...
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1answer
667 views

Password storing in Google Chrome content scripts

I am planning to store the login credentials in Google Chrome content scripts. The content scripts will then use these credentials to login to a website when I open it in Chrome. I wanted to ...
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1answer
76 views

Parameters in output of password hashing function

A number of encryption functions include their tuning parameters in the output. For example, SCrypt, which I've been considering for an app I'm building, outputs in the following format: ...
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1answer
155 views

Error using ncrack

I am trying to run a ncrack command of the following format: ncrack -P filePath1 filePath2 --user user1, user2, user3 ipAddress:port and I get the following error; Does anybody know why I'm ...
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2answers
240 views

Is there guidance that says all sessions to be logged off when a user changes their password?

Often when an account is hacked, security guidance is to change your password. However I've noticed that changing a password sometimes isn't enough to log out of other sessions that are active. Is ...
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1answer
200 views

tools automating logins/hashes grabbing

Lets assume I have access to the windows machine. I want to grab raw info about logins/hashes from both system and installed apps, dump and analyze it later. I could manually dump things like SAM ...
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40 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 ...
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70 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 ...
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26 views

How to secure Linux terminal with Google Authenticator? [migrated]

How to secure Linux terminal with Google Authenticator for root access and login?
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51 views

Powershell and cached credentials

In my environment we have powershell remoting off- I get around this using 2 hop scripts, packages(exe -no creds are stored in code- local privs only), and iwmi. I never pass creds to the endpoint, ...
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29 views

How to analyze netstat for suspicious connections? [closed]

Somebody accessed my Microsoft account this morning and the IP that did it came from Thailand. A couple of days prior the incident, I noticed that my Command Prompt opened and closed immediately many ...
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2answers
123 views

Pin delivery: SMS, mail, or pin mailer?

Imagine a scenario where a 4-digit pincode needs to be delivered securely to an end-user. Several possibilities exists: Pin mailer (this seems to be standard according to ISO 9564-1) SMS Email Email ...
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95 views

Is Trillian application unsafe? (Got “Someone has your password” message from Google)

Trying to connect to GoogleTalk from the Trillian app for Android (a universal instant messenger app), I got denied even with the correct password. Then Google e-mailed me saying that my password is ...
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112 views

Can password hashing both client side and on the back end improve security if we don't necessarily trust the server? [duplicate]

I want to know if it ever makes sense to hash a password client side and rehash it again on the back end. I've not seen this done before which makes me suspicious as to whether it really does add ...
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58 views

Is that a way break Linux user password by bypassing grub protected?

The best way to delve into others Linux machine is by editing the grub. Many will start by, editing the line ro quite splash as rw init=/bin/bash during the startup (usually by pressing button e on ...
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1answer
98 views

PHP BLENC extension security concern

PHP BLENC is a extension that allows PHP developer encrypt their code, protect their ideas and avoid illegal copy. Although BLENC allow developer to define the main encryption key in source(in the ...
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34 views

Under what conditions does Safari have access to the Keychain?

The Keychain is shared among many different apple products and includes asymmetric, symmetric, and other types of security data. People who use iCloud, and also enable the keychain synchronization ...
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186 views

Securely storing users PIN on Android with fingerprint authentication

I am have an Android app where the user can enter a pin specific to a particular phone to save them entering the full password. I'm now looking at the new fingerprint reader API on Android M where I ...
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76 views

How secure is Asus router latest framework function: “Added protection mechanism for GUI login brute-force attack for login username and password.”?

I have just updated my RT-N12 D1 router to the latest framework, and it has new function - "Added protection mechanism for GUI login brute-force attack for login username and password.". I Googled and ...
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149 views

Google account's password exposed after authorizing web apps to the account

Yesterday I registered accounts on some online storage websites. On that same day's afternoon, Google notified me about someone had has logged in using my Google account in US (clearly that's not ...
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1answer
105 views

Recover 7zip password with partial password matching [duplicate]

I encrypted some files using 7z with AES-256 + file name encryption. The compression level was Ultra, method: LZMA. The password I regularly use is 16 digits. Now the file is not opening. I guess one ...
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46 views

Key stretching approaches

I've seen that a number of key stretching algorithms and they involved increasing the number of operations needed to compute the key(i.e. the number of rounds within a hash function). But, I wonder if ...
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77 views

Customized approach to protect plaintext passwords/usernames in database table?

I'm in the process of building an app to let users sign up, connect their many email accounts (like Gmail) to the site, and allow email-related activities... like sending an email (please don't ask or ...
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86 views

Impact if password is visible on interceptor in case even we deployed HTTPS [closed]

Our application is on HTTPS but password is visible on interceptor while when we check it via Wireshark it's encrypted. Is there any risk in it? And what kind of impact it can have?. We provided the ...
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3answers
79 views

Password help with coding! [duplicate]

So, I'm terrible with any sort of coding, and I need help with generating a series of possible passwords. I've forgotten the combination of a password I put in for an email - I know the password, just ...
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298 views

WifiPhisher not creating a fake access point

I recently came to know about WifiPhisher. To test it, I set up an access point using my Windows laptop and tried to obtain its password using this tool in my Ubuntu machine. So, when I run the ...
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1answer
30 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 ...
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1answer
98 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 ...
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855 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. ...
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264 views

Deobfuscated Malicious PHP Code Comprehensively [closed]

I found 3 php files in a htaccess-password-protected upload folder on my server: 1. default_folders.php 2. factory.php 3. HMAC.php Each of them contains a variable string, eg: ...
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101 views

Hashcat Turkish character problem [closed]

I'm using cudahashcat, it haven't special chars like "öçşĞÜ" in standart charsets. I defined charsets with windows-1254 and other encoding types(and -1 öÖçÇğĞşŞüÜıİ?a parameter), i tried but they ...
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76 views

sample/starter code to test for TRUSTe password requirements [closed]

Considering its a requirement for Truste certification I figure that the code to test for a password meeting Truste's password strength requirements has been written more than a few times. I was ...
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130 views

Should a password ever be presented in plain text to a user (On a website)? Is this illegal under UK Data protections act? [closed]

There is a website I use at work, external to our own. They have just presented with every employee with their plain text password and username via our internal website which requires our own logins. ...