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

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1answer
36 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 ...
12
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5answers
4k views

Is saving passwords in Chrome as safe as using LastPass if you leave it signed in?

Justin Schuh defended Google's reasoning in the wake of this post detailing the "discovery" (sic) that passwords saved in the Chrome password manager can be viewed in plaintext. Let me just directly ...
3
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1answer
110 views

API to change passwords?

After I learned last week that the login data of some of my accounts was leaked, I had to change my passwords for more than 30 sites. That was tedious! As luck would have it, some days later we ...
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6answers
1k views

Do salts have to be random, or just unique and unknown?

First of all, my motive is to avoid storing the salt in the database as plain text. As far as this question is concerned, the salt is not stored in the database. After discussion in comments and in ...
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1answer
43 views

Hashing password for secure storage (generating salt)

I wanted to check if the following means of generating a hash for storage of a password was secure. I have an username and password combo. In order to generate a secure hash, I am doing the ...
5
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1answer
70 views

What happens if biometric data is stolen?

As we move toward a future where fingerprints might possibly replace passwords, I see one issue. While passwords can be stolen, they can be changed by the owner after being notified of the security ...
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1answer
51 views

What to do with .hash files when cracking WPA2

So, I'd say I'm one level above n00b. I've gotten to the point where I have accomplished a WPA Handshake (and saved the output as xxx-01.cap). I have also downloaded these hash tables (if that is the ...
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1answer
36 views

CNN Money Portfolio and Heartbleed [duplicate]

Is/was CNN Money Portfolio ever vulnerable to heartbleed? It states 256 bit SSL bank level encryption on the website..
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2answers
261 views

TPM- Symmetric key storage

I understand that the TPM can be used to store an unlimited number of keys. However I am left with a few questions: Presuming the TPM is connected on the LPC what protects the data travelling across ...
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0answers
85 views

Decrypt Passwords based on using a user's password

I am creating a database to store our client's information at work (a heritage center specializing in DNA based genealogy). Once the results of a test come back, we have people that use the ...
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2answers
68 views

Chinese or “pinyin” wordlists for dictionary attacks

Background: I am currently trying to crack a salted md5 hash which I have recovered from an embedded device running busybox and manufactured in china. I have tried john the ripper using all of the ...
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4answers
7k views

Should I change all my passwords due to heartbleed [duplicate]

Should I change all of my online passwords due to the heartbleed bug? Edit: I found a list of vulnerable sites on GitHub and checked all my critical sites. Everything I was really concerned with ...
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1answer
20 views

Save application autostart login token on computer

I need to login desktop application while autostart on server (like skype does). What is the best practice to save authentication token (password)? Should I use something like RSA encryption (which ...
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1answer
30 views

Is it safe to sign in to Google with password from desktop app like BlueStacks? [on hold]

BlueStacks is an android simulator for desktop. After installation it will ask you to login with your Google account to download and install android app from play-store. My question is "Is it safe to ...
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0answers
38 views

Brute-Force/Dictionary attack against encypted file using PBKDF2 key derivation

I have been following this very useful post by Thomas. My use case is slightly different. I am developing a mobile application which requires some sensitive data to be stored on the device in a SQLite ...
0
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2answers
101 views

If bruteforcing a password goes aaa, AAA, aab, AAB, etc, all the way to ZZZ, wouldn't ZZZZZZ be the most secure password?

I'm only taking about security against bruteforce attacks. I assume that most crackers start at a and go up to zzzzzzz for as long as instructed (so it could be zzzzzzzzzzz if told so in the ...
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1answer
180 views

The Problem with Changing All Passwords for HeartBleed [duplicate]

One thing that's been bugging me in relation to the discovery of the Heartbleed OpenSSL flaw is the recommendation that everyone should run to their computers in a panic and change all of their ...
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8answers
2k views

Why improvising your own Hash function out of existing hash functions is so bad

I'm afraid I'll have tomatoes thrown at me for asking this old question, but here goes. After reading that cooking up your own password hash out of existing hashing functions is dangerous over and ...
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1answer
42 views

Securing passwords for REST Authentication

first post on sec so go easy. I'm developing a REST application using the Spring Framework, as as part of the requirements, we have to secure the different functions of the system to different user ...
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3answers
484 views

Encrypting passwords?

I am planning on creating a text file to store my passwords, so I only need to remember 1 password (at the moment, I have about 20 long/complex passwords in my mind, and am worried that I might forget ...
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4answers
5k views

How secure is Windows 8's Picture Password login?

The final Windows 8 build has been released to manufacturing. One of the new features of Windows 8 is "Picture Password", where the end user logs on to Windows by clicking a specific pattern on the ...
3
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1answer
94 views

Password Managers: encrypted database vs hashing strategy

I'm considering moving to a password-management strategy based on supergenpass or something similar. This is an alternative to other password managers where instead of having a database of passwords ...
8
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3answers
456 views

Is it safe to generate passwords online?

I usually generate strong passwords using various online tools. Some time ago I mentioned it to friend of mine and he looked at me as if my life was one big fail. Is it really so unsafe to generate ...
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1answer
184 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 ...
16
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2answers
532 views

Bank accepts different password to the one that I set

I'm not particularly well versed in IT security so please bear with me. I recently discovered that my bank's online system will accept passwords that consist of the correct password, and a string of ...
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6answers
15k views

How safe are password managers like LastPass?

I use LastPass to store and use my passwords, so I do not have duplicate passwords even if I have to register four to five different accounts a day, and the passwords are long. How safe are password ...
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5answers
805 views

Hardware USB Key to Reset Any Windows Password

This tool requires physical access of course, and there are many things you can do once you have physical access, but this peaked my curiosity. The tool in question: ...
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2answers
92 views

LastPass login security

If LastPass does not store your master password, then how can you login to use their web app? Surely you must type it in, it is sent over using SSL, and then salted/hashed on the server-side, and ...
2
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1answer
32 views

Windows Scheduled Task passwords

When you create a Scheduled Task in Windows, it gives you the option of running the task as a different user, including saving the password. How secure is the password that is stored?
41
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1answer
5k views

What should end-users do about Heartbleed?

What should one do about the Heartbleed OpenSSL exploit? mainly talks about what people running websites should do about Heartbleed. What should end-users of websites be doing? Do they need to ...
0
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1answer
27 views

Handling passwords in wicket

I have a form which contains a password field. In swing the getPassword() method returns a character array. After the password has been processed by my web application the array can be wiped to ...
0
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1answer
35 views

Is there an anti virus that protects processes from being injected code to?

As title says, is there an av that does that? And if not, is there any other program that protects processes like lsass in windows, apart from protected process utility in win8.1?
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0answers
26 views

Digital signature based authentication schema using two passwords

I'm working on an authentication system for a web based Bitcoin-related service. As part of the service, users do some less sensitive operations (mostly reading and sending various types of ...
3
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0answers
73 views

Is BSI’s process good? (Informing email address owners that their address/password (of unknown/different accounts) was stolen)

The German BSI (Federal Office for Information Security) claims to have got a list of 18 million email addresses and passwords – supposed to be the result of identity theft. They allow to check if ...
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1answer
58 views

Is there an equation to calculate the number of instances of a series of characters exist in a given key space?

If I'm using 16-18 character-length passwords with 94 different possible values-per-character (lower alphas, upper alphas, numbers, and special characters), is there an equation I can use to calculate ...
244
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18answers
35k views

How does changing your password every 90 days increase security?

Where I work I'm forced to change my password every 90 days. This security measure has been in place in many organizations for as long as I can remember. Is there a specific security vulnerability ...
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0answers
43 views

Lock Windows to a specific app

Is it possible, using some program or application, to lock Windows 7 so only a specific app can be used, for example Word, until a password is entered? Thanks!
2
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1answer
146 views

How was the Xbox One password verification compromised?

So, we have this article: http://www.engadget.com/2014/04/04/xbox-live-five-year-old-hacker/ Apparently, using nothing but spaces the local account (with an obviously saved password... I hope) was ...
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4answers
199 views

Relationship of password strength and key strength

I have just started educating myself about cryptography, and while it is mostly making sense, a few things are still eluding me. One being: In systems that take a user's pass-word/-phrase in order to ...
2
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1answer
55 views

Safety while ciphering data

Say I wanted to encrypt some sensitive information with a symmetric algorithm using a program on a computer. Is it possible that a hacker could retrieve the data,salt, iteration, cipher, keysize while ...
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2answers
102 views

How could police identify digital contraband and charge someone if it's encrypted with keys?

For example, say I am transferring heavily-encrypted DVD/Blu-ray movies/game copies over the internet. However, I am using double or (+) encryption with keys required to decrypt the file using an ...
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1answer
62 views

Is using MD5 in NTLMv2 protocol to store Windows passwords is secure?

I read that Windows (probably not new OSs but say, Windows Server 2008) stores passwords using Hashes using NTLMv2 protocol which uses MD5 hash function. My questions: MD5 is known to be insecure ...
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0answers
25 views

How many possible combinations in 8 character password? [migrated]

I need to calculate the possible combinations for 8 characters password. The password must contain at least one of the following: (lower case letters, upper case letters, digits, punctuations, special ...
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1answer
29 views

How many possible symbols and punctuations in a password? [closed]

I want to compute the possible combinations of a password consists of 8 digits of: alphabetical letters (26), numbers (0-9), symbols and punctuations. In order to compute this, I have to know the ...
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2answers
73 views

How many bits of entropy should I aim at for my password? [closed]

I mainly use 2 passwords: 1 is a 4 word full lowercase passphrase of 18 letters long which I use wherever possible. The other is basically 3 words and a digit with the first word in full uppercase and ...
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2answers
88 views

How can I analyze password recovery tokens?

All websites that support authenticated user interactions have a password recovery feature. Usually they will email the password reset link through which you can easily recover your account by typing ...
2
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1answer
76 views

Locality Sensitive Hash (LSH) function to approximately match old passwords

Recently, I ran across a website that requires me to change my password after X number of days had passed since I had last created one. Intelligently, the service made sure that the password did not ...
0
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2answers
299 views

Registration Password

Is it best to create an application that allows a user to sign up with username and email at the beginning and password once you click the generated email sent to you or should the password entering ...
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1answer
305 views

How to crack SHA512 hexdigest passwords with John the Ripper?

I've been playing with John The Ripper (JtR) to try to crack/audit a salted password that was hashed with SHA-512, with 20 interactions according to the source (for the curious, this is a Rails app, ...
21
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3answers
2k views

Is there any advantage to splitting a password?

I've been reading about the LANMAN (LM) hash and I'm curious about a particular part of the algorithm. The LM hash is computed as follows: The user’s ASCII password is converted to uppercase. ...