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

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3answers
2k views

What's the use of making users use digits, uppercase-lowercase combination password if the passwords are hashed?

Some websites, even the StackOverflow asks for atleast 1 digit, 1 uppercase character in the password. Does this really matter when the developer uses a password-hash algorithm to store the passwords ...
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votes
1answer
2k views

Retrieve Admin Password from router [closed]

There is a way to retrieve a router admin password without hard reset? I'm loggen on LAN and know username and local ip address... TKS
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votes
2answers
82 views

Can I prevent brute forcing of hashed+salted user passwords without a dedicated validation server? [duplicate]

Salted hashes don't seem to offer any real protection for user passwords by itself. So long as a hacker has a quick way to check if a password is right or wrong, it's trivial to brute force it to view ...
-3
votes
2answers
2k views

Is pixel based image encryption secure?

I have encrypted an image using pixel encryption method. I just used a bmp image for that. What I did is, I retrieved each pixel value from the image and obtained the value of red, green and blue ...
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votes
1answer
126 views

What is the algorithm of bcrypt? [closed]

In many places I heard that people recommend to use the bcrypt algorithm to save passwords into database while creating web applications.I want to know what is the algorithm used to bcrypt a password ...
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votes
1answer
42 views

Which encryption technique should be used for users name and passwords in my notebook [duplicate]

i writing all my passwords and users names on my notebook emails,amazons,facebook. and i have really Nosy little's brothers that will probably look at my notebook when i am not around, which ...
-3
votes
3answers
318 views

Hashing credentials. Is hash(email+password) secure enough?

I am working on a client server application where to identify each user I was thinking of storing a single database entry: hash(email + password) In my opinion, this is enough to stop some known ...
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votes
1answer
68 views

How do I get the password knowing part of it and the length [closed]

I'm new to all this, I'm trying to use Hash Suite to find a password with a word + 2 numbers. I know what the word is but not the numbers but I also know the length of the passwords ... What do I have ...
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1answer
393 views

What type of hash is this MD4(MD4(($pass)).(strtolower($username))) [closed]

Can I decrypt this hash? Domain Cached Credentials: MD4(MD4(($pass)).(strtolower($username)))
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votes
1answer
82 views

Make password list with crunch [closed]

I want to make some password list like this : A4B9D It should has these : 5 characters first, third, and fifth characters are letters (A to Z) second and forth characters are numbers (0 to 9) ...
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votes
2answers
1k views

Time it takes to crack a password on site like yahoo [closed]

I have a question. If you were using a password brute force/dictionary attack utility on a site like yahoo or another site, how long would it take to crack a password like Jah13Wootiang if Wootiang is ...
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votes
2answers
190 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 ...
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votes
1answer
965 views

What are some good user login/authentication libraries or protocols to use with Python on Google App Engine? [closed]

I've read elsewhere (http://forums.udacity.com/questions/6028436/bcrypt-not-suitable-for-pythongae) that bcrypt is not suitable for use on Google App Engine. What are some good ways to create a user ...
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votes
1answer
120 views

Why should I use the VPN? [closed]

Does a Virtual Private Network (VPN) provide an encrypted connection from outside networks or from ISPs to the internal network?
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7answers
2k views

Are passwords made up from concatenating a few foreign words better than shorter random characters? [duplicate]

Does it make sense to insert a foreign word into a paraphrase to mitigate against brute force? For example: "pussiMeansCatInEskimo" "caballoMeansHorse" "CatIsGatto" "SalopeMeansBitch" ...
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votes
1answer
465 views

Why don't we do dual password instead of forgot password?

You can see the link "Forgot Password?" nearby almost all login form. Since passwords are completely protected from outside access, I come up with this question. I accept that the forgot password ...
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votes
2answers
374 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: ...
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votes
2answers
463 views

How do I construct a rainbow table to crack a 6 character password? [closed]

Given the hash: 491c290affbf5436f0fc0584ccefb2 how do I construct a rainbow table to crack this password?
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votes
1answer
93 views

Time-based password change [closed]

I have created this script and it runs great, but important questions remain. Is this script useful and secure? Does it have any possible problem or weakness? root@010010:/# ls -la ...
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votes
1answer
634 views

Feasibility of brute-force on online password [closed]

I am familiar with how offline brute-force attacks work. But for online accounts, assuming no social engineering, how feasible is it to brute-force attack a password? For example, is this dependent ...
-4
votes
1answer
2k views

Good Password Length [duplicate]

If you are looking to be careful and your passwords include all the types of characters, what is the ideal password length?
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votes
2answers
74 views

How does the password become 30,000 times stronger?

This google support page says: For example, an eight-character password with numbers, symbols and mixed-case letters is harder to guess because it has 30,000 times as many possible combinations ...
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votes
1answer
167 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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votes
1answer
5k views

How to decrypt the encrypted data, in SHA256, of mysql database? [closed]

I have some data in column of table of mysql database in the encrypted form applied with SHA-256. How to decrypt that data using Java. I stuck at this since 4 days. Please spend 5 minutes of your ...
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votes
2answers
645 views

in which format this code is encoded ? and how i decode it? [closed]

"jmHMRWncShQ%3D" this is my encoded text , i want to know that in which format , this text was encoded , and also want to know that how i decode these types of code ??? this password may be ...
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votes
1answer
70 views

What is AES 256 bit encryption? [on hold]

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 ...
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votes
3answers
78 views

how to know the way in which password was encrypted [closed]

i have a encrypted password basically hashed i don't know what it is some thing like 11dfb34b27f539a5e785b68e529fd470 and i know the password i.e., the plain text but i want to know the way that how ...
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votes
1answer
122 views

What is the most secure way to protect a custom CMS from infiltration? [closed]

I have a custom CMS with a randomly generated ASCII 100-character string from this site for both my username/password. I also have this following sha512 encryption system, which was created by ...
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votes
1answer
214 views

How can I crack ArrayOS password [closed]

I have some Array Load Balance device that the user password hash like: user "array" "XXXXXXXXXVkjTX9a1kYtNo". How can I crack the password or find out the algorithm of the hash?
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votes
1answer
757 views

How to use wordlist [closed]

I have downloaded a wordlist from https://crackstation.net/buy-crackstation-wordlist-password-cracking-dictionary.htm The size of the wordlist is 4.2 GiB (compressed) or 15 GiB (uncompressed) The ...
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votes
1answer
98 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 ...
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votes
1answer
140 views

Make really personalised wordlist file

i want to make a really customised wordfile with: 4 letters first + 2 numbers example: divo11 or yeve11 And not like this: p0oiw1 or u4hf3e This wordfile is really important. How can I do it?
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votes
1answer
584 views

Secure Web application Password vault/manager [duplicate]

I would like to build an open source online password vault which allows users to securely store their passwords, like Keepass or roboform, but where a user can access their passwords through a ...
-7
votes
1answer
215 views

How to attack on a web page to gain username and password? [closed]

In a situation where a web page is not using SSL and someone wants to attack to gain the username and password. How it can be done? Given the situations: Passwords are not stored in plain text. ...
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votes
2answers
5k 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?
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votes
1answer
194 views

Can you decrypt this encrypted password? [duplicate]

I'm coding a social network so I need to get serious about security as people will be sharing personal information on my site. Can you decrypt this encrypted password? ...
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6answers
150 views

Is the password FFFFFggggg&&&&&22222 safe from being guessed? [closed]

It is 20 characters long, mixes alphanumeric and special symbols. It is one among ** 20.
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1answer
367 views

I need help on how to hack into a scammer computer via IP/DNS [closed]

I really need your help in this one. Today I got scammed by a "trader" for 100$, but I managed to get his IP, reverse DNS and Hostname but I am unskilled in hacking. I need help here, I just want to ...