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

learn more… | top users | synonyms

0
votes
0answers
766 views

Why do you need to login after you change a password? [duplicate]

I can't recall a website that after resetting my password I was automatically logged in, I had to type the password again - which seems quite silly. From a security perspective, why do websites do ...
0
votes
1answer
139 views

What is a preferred method of security-conscious creation of login cookies [duplicate]

Possible Duplicate: Is it safe to store the password hash in a cookie and use it for “remember-me” login? I am working on a webapp that uses localStorage alone (http://...
0
votes
0answers
244 views

What is the most secure way to recover password online? [duplicate]

Possible Duplicate: Can anyone provide references for implementing web application self password reset mechanisms properly? I have website which sends generated password to any person who ...
0
votes
1answer
1k views

What's the idea behind requiring users to change password periodically? [duplicate]

Possible Duplicate: How does changing your password every 90 days increase security? Some sites require users to change their password every x days. For example, at least 3 online banking ...
0
votes
3answers
152 views

Creating user and safely sending password

Assuming I currently use a safe way to salt-challenge-response-authentication-method, passwords are stored secured and all. I now question myself - how do users set the password? Meaning, they enter ...
0
votes
1answer
192 views

Secure way to encrypt (not hash) passwords?

I'm building a system that for reasons I'll outline below, can't used hashed passwords, but I'd still like to encrypt them so that it's as hard as possible to crack them, in the (unlikely) event the ...
-1
votes
4answers
172 views

pesudo random password

I post a question before about one password repeating to make it longer, now its a new way want to ask about, if take the word 'secure' and instead of repeating it put somenumbers between it, exp: ...
-1
votes
1answer
255 views

Is my hashing technique secure? [duplicate]

I am not sure if this is the best place to post this type of question. I have come up with function which, I believe, is a very secure method of hashing. (I could be completely wrong). Here's the ...
-1
votes
1answer
1k views

Changing user account passwords from PHP script - vulnerabilities? [closed]

I started a thread a while back asking for suggestions on a good (good=fairly secure) way to allow users to change their account passwords via a PHP script. (WHY? because on this particular server, I ...
-1
votes
1answer
147 views

How can this encryption algorithm be improved?

I am currently developing an application to store my passwords safely. It will be a proof-of-concept at first, but I am planning to upgrade it later. Anyway, here is how the passwords are accessed: ...
-1
votes
3answers
2k views

Gmail, Yahoo, Hotmail , and so on; How do they check the content of an attached password-protected archived file like Winrar?

How is it possible that mailing systems like Gmail, Yahoo, and Hotmail are able to check the content of an attached password-protected archived file like WINRAR, if the password cannot be guessed, ...
-1
votes
3answers
702 views

find password and iv of an encoded string knowing the decoded string

If I would know the clear and encoded versions of a string could I somehow find the password and.or iv that wore used to encode it? Encoding done with open_ssl aes-128-cbc.
-1
votes
1answer
4k 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 ...
-1
votes
4answers
363 views

How do big companies and wealthy people secure their information? And how can I secure mine?

I've recently had some success and traffic increase with an online business I own and due to that someone has hacked my domain email and twitter accounts. My bank password is the same and I just ...
-1
votes
3answers
451 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 salted-and-...
-1
votes
1answer
307 views

Password sending through network [duplicate]

In case of no TLS/SSL available, why can't I use the hash of the password (SHA512) as the key to encrypt the password (with out any salt) to send through the network ? MITM attacks I can understand, ...
-1
votes
2answers
15k 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 ...
-1
votes
1answer
154 views

CRC-96(ZIP) decryption

Is there a way to decrypt CRC-96 encrypted string? I am testing a web application which stores the password in the database in CRC-96 encrypted format.
-1
votes
2answers
81 views

Creating secure passwords [duplicate]

I have been tasked with writing a random password generator to be used on a series of throw away accounts. In this scenario, the accounts need to be very secure and will be deleted after a single day ...
-1
votes
2answers
51 views

What could be a suitable solution to single factor authorization worksheet bank password circulation with no control?

Passwords for various banks are written in an excel sheet and this excel sheet is password protected. However, there is no control on circulation of this sheet, for many banks only single factor ...
-1
votes
3answers
120 views

Best way to securely send passwords from an application to a user operated server

I have the following situation: A user sets up a server that will have to receive login details. Other users then create accounts and login to this server. All this happens only over LAN. I'm ...
-1
votes
2answers
138 views

How much do unusual characters in passwords help?

If I use a system that allows all Unicode characters or a similarly large space for passwords, how much would using an unusual character help in practice (for example, ࡀ ,which I found under Mandaic ...
-1
votes
1answer
534 views

After salting my passwords, are they protected against dictionary attacks? [duplicate]

I use sha1() to hash my users passwords, but recently a friend told me that if someone get the hash then they could use dictionary attack and he recommended using salts. I implemented a random salt ...
-1
votes
2answers
135 views

Can 2FA help handle mixed personal and business accounts after leaving a company?

I do not want a super administrator in Google Apps to log to my account after leaving company, so I enabled 2-step verification. He could login to many sites as me with just a link in "forget password"...
-1
votes
2answers
72 views

Website says my new password can't be used because it is the same as an old one [duplicate]

What are the risks of storing (in hashes I guess) all the old passwords? Why would a company chose to not delete old passwords? Why not let users reuse old passwords?
-1
votes
1answer
136 views

Is it okay to have a blank root password for MySQL if port 3306 is not forwarded?

I'm running a PHP server that will use the root account to access the database. However, the server is behind a router and port 3306 is not port forwarded. Is it okay to have a blank password for the ...
-1
votes
1answer
149 views

client side and server side hash password [duplicate]

Another question about client or server side password hashing, I know. After reading many other post about this topic I'm still a little confused and not completely sure what is the best, because I ...
-1
votes
1answer
144 views

Why doesn't the OS give every application a secret password?

As far as I understand if Dropbox wants to automatically run in the background without asking the user for a password it has to store the password somewhere on the harddrive and has currently no way ...
-1
votes
3answers
101 views

What does one call the strategy of using “pre-password transforms” as passwords?

Suppose that instead of using, say, Google, let me in! as my Google password, I used some consistent transform of this string, say ZWE1NjMyNm? What search keywords would be helpful to search for ...
-1
votes
2answers
163 views

Simplest way of hashing a password with multiple different hash algorithms [closed]

I have a list of plaintext passwords that I would like to hash with various different hash algorithms (for educational purposes). As a minimum I would like to obtain hashes under MD5, SHA1, SHA256, (...
-1
votes
2answers
208 views

How does salting increase security? [duplicate]

I'm currently going through a course on software security. I've recently been introduced to the idea of password salting, where a random value is concatenated to a password prior to being hashed and ...
-1
votes
1answer
7k views

Hydra bruteforce is giving wrong passwords. Can't seem to work any help? [closed]

Ok so what im actually trying to do is to bruteforce my own account on some website just to check myself . This is NOT for illegal steps or use , im trying to crack my OWN password , and im trying to ...
-1
votes
1answer
398 views

How can I encrypt my router admin page login session? [closed]

I login to my router using the web connection but the session is not encrypted, is there a third party way to encrypt the web session so no one on my network can sniff the password?
-1
votes
1answer
141 views

What makes EAP-SRP-256 better than SRP? [closed]

What is the advantage of the EAP-SRP protocol? Is it only used in wireless?
-1
votes
1answer
659 views

What encryption hash function I should use for password securing? [duplicate]

Possible Duplicate: How to securely hash passwords? What is the best encryption algorithm? MD5, SHA1, SHA2 or maybe something else? Can you explain me why?
-1
votes
1answer
41 views

Quantum Computation and its threats [duplicate]

Since Quantum Computers has potential to become super computers of next generation. will that make cryptography obsolete..?
-1
votes
1answer
135 views

Can I encrypt Windows' SAM file?

i recently learned that the SAM file in Windows is easily crackable, and even if an attacker couldn't find my password, there are tools that allow password removal, account elevation and even account ...
-1
votes
1answer
218 views

Is hashed password safe if salt and key are stored with the hash

I am trying to hash the password using SHA256 with random salt and random key in php and storing back hash value with salt and key used. I want to know does this provide adequate safety? The ...
-1
votes
1answer
180 views

Free VPN and bank password security [closed]

For some odd reason my online banking fails when on mobile data. It works fine on wifi. In times past I used nokia's Xpress browser to route it through their servers but it is no longer available for ...
-1
votes
2answers
2k views

SHA256 to text or MD5

I want to decrypt a sha256 to text. Is there a way other than bruteforcing to decrypt sha256? Like if I convert that SHA256 to MD5 and then try decrypting?I know its hard and the possible way for ...
-1
votes
1answer
417 views

Brute force attacks detection risks

I would like to ask if using brute force attacks on some websites or online services can be risky in any way for the hacker? Let's say that someone is using medusa tool to crack password on his ...
-1
votes
1answer
79 views

Is digested password safer than salted password?

which scheme is the better one in your opinion? I know that both are secure but which is better one? I know that digested passwords are very difficult or even impossible to decrypt. Thanks for your ...
-1
votes
2answers
533 views

What time do dictionary attack take on salted passwords?

I was reading that the designers of UNIX password algorithm used a 12 bit salt to modify the E-table of the unix hashing function (the DES). Supposing i have a system with 2^(24) users? Is that ever ...
-1
votes
4answers
52 views

How are salts safe in the database? [duplicate]

I have read many and many of this type of question on the security stack community before I asked this question, but one thing that made me mad about salts and saving it in database is this ... I will ...
-1
votes
1answer
45 views

What are the exclusions for using a very long and random password? [closed]

It is a good practise to always use long (63 character) and random passwords. Question: But what are the exclusions? Can someone mention cases? Example: when console login is needed (so not via ...
-1
votes
2answers
1k views

Simple Ciphers to Create Secure Passwords

A shift cipher shifts every letter of a word by "n" amount and creates new word. The number of possible keys in the shift cipher is equal the size of the alphabet set from which the word is derived. ...
-1
votes
1answer
180 views

How Does VMWare Protect Passwords? [closed]

I am interested what features VMWare uses to protect passwords inside the virtual machine.
-1
votes
2answers
104 views

Secure password generation for different websites [duplicate]

I came up with the idea to generate passwords for internet sites by the following shema: $masterpassword $hostname $TLD hashfunction($TDL.$masterpassword.$hostname) So the actual password is a ...
-1
votes
1answer
93 views

Do you consider PWGen safe to use?

Do you consider PWGen safe enough to use? What do you use to make truly random password. PWGen should be using "movement of your mouse" to make it really random, right?
-1
votes
1answer
124 views

How does one securely create a MySQL database and user via the command line?

I'm making an app whose functionality includes creating a database and its user. This is accomplished like so: mysql -e "grant all on database.* to 'user'@'localhost' identified by '$PW';" $PW is ...