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

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1
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4answers
157 views

How to store passphrase in this situation?

How to store a passphrase with a Java application that periodically needs access to its plaintext form? It is a strange situation, but I am wedged in it. If providing a decent security mechanism is ...
1
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1answer
232 views

how to pass credentials across applications securely?

To simplify the user experience , if we want to design a system such that the user login password for the desktop account itself can be shared with various applications like chat/email/skype etc. ...
2
votes
3answers
110 views

Limit attempt of user login against PBKDF2

I have been tasked been tasked by my boss to change the encryption system of our web application from MD5 to PBKDF2 as MD5/SHA1 has been shown to be breakable in recent years . I argued against it ...
-2
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2answers
81 views

How to make a strong password? [duplicate]

I always hear conflicting things. Should I use a long sentence? Or is this privy to dictionary attacks? Or should I use a long string of random alphanumeric garbage with upper/lowercase and ...
6
votes
2answers
417 views

Security risks of typing wrong password

I accidentally typed my root account password on my google account login, I know google keeps their website quite safe but this question came in mind: Is there a risk if you accidentally type in ...
1
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1answer
120 views

Security implications of setting the same password on private key and PKCS12/JKS?

Are there any negative security implications of setting the private key password (DSA in this case) as a PKCS12 (and then JKS) export password (instead of generating/inventing a new one)? My use case ...
0
votes
1answer
755 views

How to enable a http post form penetration test?

I don't get the correct results and I'm not sure what I'm doing wrong: $ ./hydra -l admin -x 3:9:a http://localhost http-post-form "/admin/login:j_username=^USER^&j_password=^PASS^:failed" -s ...
32
votes
2answers
1k 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 ...
5
votes
3answers
17k views

Four-way Handshake in WPA-Personal (WPA-PSK)

Can someone explain to me in what consists the Four-way Handshake in WPA-Personal (WPA with Pre-Shared Key), which informations are being sent between AP and client, how is it possible to find the AP ...
3
votes
1answer
114 views

Should an administrator be able to turn off TFA for a user

We use Google Authenticator and SMS for two factor authentication. Should we allow the administrators of the site to turn off TFA for users? Google Auth uses SMS as backup option but SMS does not ...
-1
votes
1answer
3k views

Is my information secure when using Private Tunnel? [duplicate]

I am using Private Tunnel to do some tasks involving sensitive data like logging in to PayPal and online banking. Is my data safe or can it be retrieved by other users of the Private Tunnel service?
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2answers
118 views

I don't understand how BIPS got hacked [closed]

http://www.networkworld.com/news/2013/112513-bitcoin-robbery-276352.html In this story we can see BIPS got hacked, but I don't get how it was hacked when it was offline because of the DDoS.
6
votes
2answers
422 views

Stolen Laptop - Next steps

My laptop (modded 2007 Macbook Pro) was stolen 2 days ago when I didn't pay attention to my backpack in a tourist spot in Europe and while I'm quite certain they won't have much use for it (the apple ...
2
votes
1answer
142 views

After having confirmed a computer is infected by a Botnet.

And having found a server IP that is controlling it. How can I find out the log-in credentials this client uses to log in to a IRC channel / server webpage / control panel. I have found out a python ...
0
votes
1answer
99 views

Banking platform accepts password containing subset of real password [duplicate]

How would it be possible that if my password was 123abc that my bank also accepts something like 123abc12? Isn't that an extreme security flaw? If the password was hashed and salted, wouldn't the ...
16
votes
3answers
3k views

Security of LastPass + YubiKey

I'm looking at password manager solutions and came across LastPass. I see they also support two-factor authentication using YubiKeys. How secure is this combination for password management? What are ...
4
votes
2answers
162 views

Is it ok to email someone their password from a newly created account? [duplicate]

I have a pretty standard registration form. One thing I've decided to do away with is the requirement to enter the password twice, for usability reasons. In order to mitigate the increased risk of ...
9
votes
4answers
491 views

Password security

I was requested at the login page of a website to first change my password. After typing in a new password, the web page told me the new password did not differ enough from the previous one. Does this ...
1
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0answers
75 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 ...
3
votes
1answer
257 views

is 'mysql_real_escape_string' enough

Recently on stackoverflow I've seen many discussions that mysql_*_escape_string is deprecated and instead recommending PDO. The way I've been doing it was to allow only letters and ' in the name field ...
0
votes
1answer
104 views

Question about a “Password Space” definition

I am currently reading the "Green Book" (http://csrc.nist.gov/publications/secpubs//rainbow/std002.txt) of the "Rainbow Series" and have a question on chapter "C.4 Password Space". From this ...
0
votes
2answers
112 views

Using the same base string for a password in several different logins [duplicate]

It is clear to me that using the same password for different websites is a bad idea because if an attacker manages to get a hold of your password, then he can gain access to the other websites in ...
0
votes
3answers
106 views

Best way to store passwords for a LAN tool?

I am making an app in Python for linux as a front end to the router (to automate some tasks). But I need to log in to the router before I can do any operations on it and since it uses a http-auth I ...
1
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3answers
176 views

S/MIME doesn't protect against a stolen password, right?

We're setting up S/MIME so that we can send encrypted emails. However, I have a bit of a stupid (and maybe obvious) question... If someone steals a password for either the sender or the receiver, ...
2
votes
1answer
92 views

Does it make sense to use two factor authentication with password protected wp-admin folder?

I've finished building my wordpress website and now, I'm concerned about the security of the website. To improve security, I'm using Google two factor authentication plugin while also ...
2
votes
3answers
1k views

Microsoft password email reset link leads to different url?

...I am really annoyed and unsettled by the password reset email I just received from Microsoft. What should I think of this? My email client correctly told me that the underlying url is not the same ...
0
votes
1answer
139 views

Why is there a “show password” functionality in some login forms? [duplicate]

I've noticed that on a lot of login forms in websites and applications that there is a "show password" check box. Why? I myself have seen some hacks that an attacker could hack the input password box. ...
32
votes
10answers
4k views

Is there any point in using 'strong' passwords?

Let's say I'm setting up a new account on a website. Should I bother using a strong password? My reasoning is this: Password strength is a rough measure of how long it would take to brute-force my ...
4
votes
2answers
877 views

How does processor architecture affect password hashing speed?

Does hashing speed vary significantly using different architectures (x86 vs ARM)? Scenario I am investigating the possibility of using a cluster of Raspberry Pi for cracking passwords hashed with ...
277
votes
13answers
55k views

Are passwords stored in memory safe?

I just realized that, in any language, when you save a password in a variable, it is stored as plain text in the memory. I think the OS does its job and forbids processes from accessing each other's ...
5
votes
4answers
420 views

Is it a good idea to have a “master” password?

Though I do have a good memory of passwords, it is quite impossible to have one password per application. Yet, it should be... My current way to deal with passwords is to have five passwords and to ...
1
vote
3answers
160 views

Cracking passwords after a patteren with ex. John

So i am trying to find out how easy it is to crack a password using some great Linux tools. We all know about John as a password cracker and how great it is. But how about specifying a patteren. ...
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0answers
24 views

How is password character validation in 3D secure is implemented? [duplicate]

We have a website which stores hashed passwords in the database. During logins we hash the password entered by user and compare two hashes. This is quite standard so far. Our client which is in ...
29
votes
7answers
2k views

How do I educate others about social engineering?

One of my friends used to boast about how long his passwords are. One day, I decided to play a prank and social-engineered it out of him. I was pretty surprised as to how effortless the entire ...
-4
votes
2answers
220 views

Inform someone about a hacked account [closed]

I'm not a hacker but recently I was able to get someone's email password. I want to teach him a lesson to be careful when using internet and to pay attention to his passwords but I have some problems: ...
55
votes
21answers
10k views

How can I avoid my password being harvested by key loggers from internet cafes?

During traveling, especially in poor countries, sometimes you are going to need to use the internet at an internet cafe and you really can't be sure whether anyone has installed anything to listen to ...
4
votes
1answer
87 views

Would siloing passwords into their own locked down schema improve security?

First off, I don't know how hackers get at an entire password table and steal them. I don't know if the owners of the website are to blame or what, but I am wondering if it involves logging into the ...
27
votes
4answers
3k views

Is it safe to show users why their password is not allowed?

/////////////////////////////// Updated Post Below //////////////////////////// This question has received a lot of hits, more than I ever thought it would have on such a basic topic. So, I ...
2
votes
0answers
99 views

What kind of attacks can be performed off a local network? [closed]

I have been working with programs like Kali Linux, Cain, etc., and I have noticed that for the most part the biggest password stealing attacks must be performed on the same network as the victim (for ...
1
vote
1answer
85 views

When is it appropriate to challenge with a secret word?

Lets say a secret word is say, the name of your first pet. Mother's maiden name is also a common one. When does it make sense to challenge the user with this? Or, what actions should be secured by a ...
1
vote
1answer
81 views

storing username/email and password with a hash of the hash of the email/password? [duplicate]

Quite the simple discussion this one (one would assume): If I'd hash the email and password, and then hash the hashes, whould this be considered safe enough or would this just be a waste considering ...
0
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2answers
142 views

Password management [duplicate]

I am work in small company. I am Java Developer and Sysadmin of remote servers. I have problem with store password from several servers. How to best way to manage passwords in company?
251
votes
10answers
29k views

Is my developer's home-brew password security right or wrong, and why?

A developer, let's call him 'Dave', insists on using home-brew scripts for password security. See Dave's proposal below. His team spent months adopting an industry standard protocol using Bcrypt. ...
39
votes
3answers
40k views

How difficult to crack keepass master password?

How easily could someone crack my keepass .kdbx file if that person steals the file but never obtains the Master Password? Is this a serious threat, or would a brute force attack require massive ...
7
votes
6answers
813 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?
1
vote
2answers
176 views

Do I need to salt PBKDF2 when it's used for AES encryption

If I'm using PBKDF2 to stretch a password into a suitable key for use in encryption with AES, should I be using a random salt (for PBKDF2, not the AES IV)?
0
votes
2answers
195 views

Encryption method and other security concerns for a simple password manager [closed]

I thought I would learn a little bit of cryptography programming by making myself a simple password manager program that I can potentially even use to keep track of my passwords. The idea is that my ...
0
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3answers
205 views

How to retrieve the admin's password of a webapp?

I'm doing a pentesting example on a web app and I have dumped all the database. I have a table with the users in plaintext and the passwords hashed. I have to find the admin's password (I know that ...
16
votes
5answers
710 views

At what length does a password stop making sense?

I'm going to recommend that our users start using a password manager and start creating strong random passwords. Though I don't know what size of a password to recommend. Is it possible for a ...
-1
votes
1answer
2k views

How can I avoid sending passwords in plain text when logging into a website?

Suppose that I login to a website. When I type my personal data, aka, password and email, the password is sent in clear text to the server, correct? Then, a network card in promiscuous mode can ...