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

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0answers
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Creating New Acc in Mac Mail 1st Connect to Server not SSL is uname & pw tx secure?

It appears that whenever you set up a new mail account on Mac Mail on OS X (or iPhone, iPad etc), that as soon as you enter the server and the mail account user name and password, Mac Apple-Mail tries ...
3
votes
1answer
10k views

Where to download a list of email accounts hacked from Adobe? [closed]

Adobe announced they had been hacked and millions of user accounts and passwords compromised. These sites allow a search on email address to see if it was compromised: https://lastpass.com/adobe/ ...
4
votes
4answers
406 views

usernames and passwords

I was thinking about usernames and passwords and I was wondering how secure it would be to instead of the server having a list of usernames and accompanying hash of the passwords, just have a list of ...
3
votes
4answers
821 views

Should user's password strength be assessed at client or at server side?

Now most of big website like Google mail, Twitter, Facebook have a feature that assesses password strength (check number of digit, alphabet, special characters, or check the similarity over already ...
5
votes
5answers
338 views

Would this idea for a password be secure? [duplicate]

I was thinking about password security this morning. Mainly, about the recent adobe hack releasing thousands of passwords. The current problem with existing passwords is that you have three options: ...
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3answers
339 views

help me about salting passwords

Eve has just discovered and decrypted the file that associates each userid with its 32-bit random salt value, and she has also discovered and decrypted the password file, which contains the ...
0
votes
1answer
118 views

Is MS-CHAPv2 incompatible with securely stored passwords?

I have a directory service that can speak a number of protocols and is used for user authentication. Currently user credentials are stored using Bcrypt to protect them in case of a compromised ...
9
votes
6answers
1k views

Is it useful to protect hashed password with encryption?

Imagine that I am hashing the users' passwords with a random, long enough, salt, using key stretching, and a secure hash. Would it be more secure to finally encrypt the hash with a symmetric key?
4
votes
1answer
1k views

OWASP Recommendation on Client-Side Password Hashing

The OWASP Application Security FAQ recommends the use of JavaScript to produce a salted hash of the password client-side with JavaScript prior to sending it to the server. Is this something truly ...
60
votes
9answers
59k 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 ...
4
votes
3answers
2k views

symetric key encryption vs hashing

This is a fascinating document: top 100 passwords from adobe breach I have a question about one part of it: However, thanks to Adobe choosing symmetric key encryption over hashing, selecting ...
32
votes
2answers
3k views

Why does Google cripple the 2FA Google Authenticator PAM module?

If you enable 2FA for Google Apps the shared secret is 160 bits. The google_authenticator PAM module on the other hand seems to use 80 bits for the shared secret. According to RFC 4226: R6 - The ...
1
vote
2answers
269 views

In what sense is Knock to Unlock safer than a password?

I've recently seen a youtube video, which is advertising an iphone app which will unlock your mac computer by knocking on your iphone. The ad is claiming that it is faster and safer than typing your ...
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votes
2answers
689 views

How to secure a login.php file? [closed]

I have a hand built website, and am triying to build a cms/admin-panel, and my username and password, are not stored in a database, but, in a two setup file like seen below. index.php <?php ...
3
votes
2answers
72 views

Is honeywords different from k-anonymity?

Ari Juels and Ron Rivest propose a technqiue to strengthen password files called honeywords . Basically for each valid password they insert fake passwords (honeywords) and if somebody tries to ...
5
votes
2answers
328 views

Can I trust large companies like Google not to store failed password attempts?

Let's say, for example, that I accidentally entered my Microsoft account password instead of my Google account password when logging in to some Google web service. After getting an error message, I ...
0
votes
2answers
219 views

Why do some websites increase the number of characters in the password field when logging in?

Why do some websites (especially banking sites) display more characters in the password field than were actually typed? This is sometimes apparent just after clicking the login button.
7
votes
2answers
343 views

An analysis of storing hints for passwords?

What are the security implications of asking users to provide password hints? What are best practices for storing user hints? What research has been done on using user-supplied password hints to ...
1
vote
6answers
257 views

Does including the username in a password make it less secure?

Many registration forms prevent you from choosing a password that includes your username. Is it a reasonable restriction from security standpoint? I can see that if your username is "foobar" and ...
11
votes
3answers
7k views

Is HTTPS and Basic Authentication secure enough for banking webservices (RESTful)?

I have been reading about SSL/TLS for the last few days and looks like it has never been practically cracked. Given SSL/TLS is used for all communications between client application and the server, ...
3
votes
4answers
607 views

How to tell if a site is securely storing passwords? [closed]

A site I frequent has a policy to make you change your password every 90 days. That's a cool policy, but I stumbled upon an old xkcd and facepalmed myself, because lots of doxing happens on this site. ...
13
votes
5answers
24k views

How secure is WD MyPassport lock

I have a WD My Passport hard drive. There is an option that allows you to lock your hard drive with a password. How secure is this lock? They don't give details about the encryption algorith or the ...
4
votes
1answer
7k views

Vulnerability of Chrome's “Login Data” file after being orphaned from the host system

Suppose someone were to knick a "Login Data" file from a Windows computer's Google Chrome profile. They don't know the machine's user account password, but they may have some ideas as to what it ...
3
votes
1answer
230 views

How Secure Rooted or Jailbroken Devices are?

I am just wondering, but how can I harden the security of jailbroken or rooted devices? I understand that SD Card can be still accessible, but how could potential adversaries compromise for example ...
4
votes
1answer
716 views

How is the iCloud keychain protected from unauthorized access?

With OS X Mavericks and iOS 7.0.3, Apple has introduced a new feature called iCloud keychain. During setup, you can choose an iCloud Security Code. This code is used when you want to grant access to ...
9
votes
2answers
1k views

Are the SS64.com password generators a good approach?

There are two password generators on ss64.com: The standard one The strong one How they work I made standalone versions of them, plus copy of the original HTML/Javascript versions, if you want to ...
0
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3answers
251 views

Storing passwords and other data for coworkers

At the moment we are encrypting our server passwords and other important data internal via PGP. Every coworker has got his/her own private key/pass combination set up on their workstation. The problem ...
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3answers
297 views

How safe is it to provide my administrator account password for a 3rd party software: EasyUS Todo Backup?

I've been recently searching for a backup solution for my Windows desktop. That's when I came across this free software called EasyUS Todo Backup. (I know it's a mouthful but English doesn't seem to ...
4
votes
2answers
249 views

Would re-salting passwords regularly in-/decrease security?

What are the (dis)advantages of re-salting a user's password regularly, e.g. weekly (or at their next login once week since the last re-salting)? The basic idea would be that users who regularly log ...
11
votes
5answers
782 views

Altering passwords before storing

Assume that I'm using bcrypt with a unique salt (or some other best practice) to hash user passwords before storing them in my database. Is there any security advantage to be gained by ...
8
votes
4answers
3k views

Security of the KWallet password encrypting application?

According to http://gaganpreet.in/blog/2013/07/24/kwallet-security-analysis/ , the KWallet password management system is quite weak, it uses key splitting, Blowfish 56, and no salt. The key ...
4
votes
3answers
748 views

Tokenless REST API security concerns

I'm designing an API in PHP/MySQL that, by its design, will not store a user's password in the database and thus does not generate authorization tokens for the client to hold. The reason for this is ...
3
votes
1answer
174 views

S/Key as an alternative to UNIX passwords

There is this password system called S/Key I saw on the Internet. Can someone give me a brief description about S/Key and how it works? Can S/Key be an alternative solution to the UNIX password ...
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2answers
157 views

What is the safest way that you could hash/encrypt a password? [duplicate]

What is the safest way that I could could hash/encrypt a password for my website?
5
votes
5answers
3k views

Alternatives to sending out passwords in plain text via e-mail?

One of my hosting providers is sending a new password in plain text per e-mail, on request. How insecure is this practice? What would be a good (more secure) alternative to this?
1
vote
1answer
679 views

Is this password hashing + salt method the most secure way possible? [duplicate]

I am just wondering what all the security experts think of my method for password hashing. I want to come up with a method I can use for all my future web development projects. First I create a ...
4
votes
3answers
865 views

Forgot Password? - sends email with plaintext password

A "reputable" education company that my university utilizes for it's Physics course online materials sent my plaintext password in an email after using the Forgot Password? tool. I know that this is ...
5
votes
3answers
528 views

comparing password hashing algorithms - PoC ideas?

OK so I just started working for a security consulting firm and we recommend SHA 256 (with salt) for password hashing because MD5 is too weak. I have read some brilliant answers (the list is too ...
4
votes
3answers
19k views

Is it possible to brute force all 8 character passwords in an offline attack?

This article states: Brute-force techniques trying every possible combination of letters, numbers, and special characters had also succeeded at cracking all passwords of eight or fewer characters. ...
2
votes
1answer
1k views

How secure is automatic authentication in Skype?

How secure is checking the automatic authentication option in Skype client? What if I sign in with Microsoft account instead of Skype id? What if both accounts are merged? Is there any documentation ...
1
vote
2answers
273 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 ...
9
votes
4answers
598 views

How can I be secure with a global salt?

If I understood the basic of password hashing and storing, what we need are: a "strong" salt a "real" random salt a unique salt per password a password hashing function with a high CPU cost We ...
1
vote
3answers
430 views

Is Password Complexity required at all

For a web-site I'm using what I hope is the most secure password storage scheme I can find, which boils down to having a salt and hashed password stored in a database of contacts:- Byte[] ...
1
vote
1answer
3k views

Brute force password cracking with a GPU

How are GPU's provisioned for password cracking? Do all, if not most cracking programs have special GPU aware software or do they just function at the basic driver or API level of the device? Can it ...
0
votes
3answers
905 views

Authenticating users to Web Apps without sending password — can anyone suggest improvements?

I have been interested in implementing authentication method for a web app that is run in modern browsers, without having to send the password over the wire. Can anyone suggest improvements or even ...
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votes
2answers
4k views

I know the WPA-PSK secured wifi password, If I use the wifi, will I be caught? [closed]

I hacked the WPA-PSK secured wifi password from one of the wifi network. If they track their DHCP Client IP, will I be caught? If yes, how? By my computer name or IP address or MAC Address?
10
votes
3answers
543 views

has scrypt withstood the test of time?

I've always heard that scrypt was better than bcrpyt... because of memory causing GPU a very difficult time to crack. However, the notion always was that scrypt hadn't been tested, it was kind of a ...
1
vote
1answer
4k views

John the ripper passwd file format with salt not working

I'm trying test password strength in one of our e-commerce sites. I'm using john the ripper to brute-force a password file. The algorithm used by PHP is: $hash = md5($salt . $pass) No other ...
5
votes
2answers
8k views

Utilman.exe command prompt hack prevention?

This trick to hack windows and reset passwords(or create new logins)has been around for ages and still works on windows 7 and windows 8. Is there any way to disable the key combination that brings up ...
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votes
2answers
13k views

Recover Windows Server 2003 admin password through restricted user

OK, so here goes after a lot of trial and error: background: My client recently took over another firm. However, apparently the administrator passwords to the server (along with some other non-IT ...