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

learn more… | top users | synonyms

0
votes
0answers
27 views

Best Practces for Security Questions

When a website asks me to enter security questions in addition to a password what is best practice on my part? This often happens with banks and other institutions but I see it less with other ...
0
votes
0answers
56 views

Good password hashing algorithm compatible with PHP and Linux apps [duplicate]

I'm looking for a password hash method for a new server system. The hashes must be generated from PHP code and verified from PHP as well as by a number of applications on a Linux system. I know that ...
1
vote
1answer
28 views

Best practices for usefully storing two factor authentication backup codes?

For a lot of web services offering two factor authentication, after setting up the system, you are given a short list of backup codes (one-time pads) that are around 7-10 characters long. These are ...
0
votes
0answers
40 views

Request for Google Password for Calendar Updates

A website that I trust (Delta Airlines) offers a link to add flight information to Google Calendar; that link opens a window asking for my Google login and password. Based on the advice in a similar ...
0
votes
1answer
83 views

Things to remember while building a password manager [on hold]

I want to build a simple password manager for desktop whose sole purpose is to store the passwords that can be read by the user as and when required. I am not considering any fancy features such as ...
0
votes
1answer
61 views

Please help clarify password hashing - salted, multiple iterations of MD5 vs bcrypt/sha2, etc [duplicate]

I was reading an article about the Ars Technica hack here and had a couple of questions. The commenter said: "PHPass uses salted and iterated MD5 to hash passwords" My question is that if I were ...
0
votes
1answer
50 views

Passwords propagation, Password Trend and Word Generator in Human Mind

Some passwords like "123456", "admin" are outrageously popular, so are the leet transformations and concatenation of digits. The users seem to pick up the password suggestions or just copy the ...
0
votes
2answers
59 views

guidelines for password managers

I use Lastpass and I'm testing out other password managers in order to set policy for organizational use. Depending on settings, I've found that these programs can automatically send your password ...
1
vote
2answers
37 views

How to avoid referer information leakage during password reset

Most password reset systems involve emailing the user a one-time link that lets them reset their password. The token needs to be in the URL, as most email clients do not allow HTML emails to perform ...
2
votes
1answer
139 views

Reverse Engineer this basic Hash using known answer?

Little background: I forgot one of my CCTV accounts password, so used the admin account to create a new one. However I can't access the old one as it's not possible to change a user account password, ...
17
votes
4answers
2k views

Is sending plaintext passwords to a SQL Server database a security risk?

I have a database which has stored procedures which take plaintext passwords. It hashes them and inserts them into the DB. If an attacker has access to the DB connection, it is possible to intercept ...
15
votes
2answers
823 views

Distance between two passwords

It is known that people reuse their passwords across different sites. The reuse can be done in two ways: using exactly same password for two different sites, slight modifying the password of one ...
7
votes
1answer
95 views
+50

What concrete parameters can I change to make my passphrase-protected private gpg key more secure

There are several questions which discuss the resistance of passphrase-protected private gpg keys against brute force attacks. It seems, this kind of discussion could go on forever. Rather than ...
0
votes
2answers
39 views

What is the severity if someone read the ConnectionStrings_Prod.config?

I was doing an (authorized) pen test in a website and the programmer did a big mistake and I was able to read any file. So I read the web.config and see the password for database was in ...
3
votes
1answer
701 views

what is a valid challenge for 2 factor authentication?

When designing password reset process: 1- Is a an email address or an assigned username a valid piece of information ( identifier) to ask for in two factor authentication? 2- How does two factor ...
-1
votes
1answer
51 views

TLS/SSL and password transmission

I am still getting confused with security topics. At the moment the advantages and disadvantages of some of authentication methods are still not very clear. According to OWASP Authentication Cheat ...
0
votes
3answers
86 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 ...
15
votes
1answer
682 views

Linux /etc/shadow password change security

I wonder what happens what happens when I am changing my password on a Linux system. Basically all passwords are stored in a file called /etc/shadow or /etc/master.passwd in BSD-like systems as I do ...
-1
votes
1answer
33 views

Why not use md5 auth mechanisms for IMAP over TLS?

I'm using Dovecot for IMAP connections. I've read a lot of tutorials on how to set up Dovecot, and a lot of them said to only allow: auth_mechanisms = plain login Why should I not allow *-md5 ...
0
votes
1answer
275 views

How to get a Network's WIFI Password through CMD?

I found that Wifi's Password can be retrived using the network and sharing wizard in Windows, And Technicaly theres no way to store Passwords/collection of bytes in the memory after switching/shutting ...
4
votes
1answer
58 views

Soundness of GRC.com Haystack padding concept [duplicate]

I was wondering how sound is the concept presented by the Gibson Research Corporation (see below if you do not want to follow the link) about simple passwords (= very easy to remember) with the ...
-1
votes
0answers
13 views

Hydra empty response, only difference is header locaion [migrated]

I'm trying to crack my web page to see if it is possible or not. When you try to login on loginpage.php, form is posted to checklogin.php. checklogin.php checks form data and sets Session if login is ...
4
votes
2answers
295 views

Including and storing the order of character entry in a password as an enhanced security measure

I'm sure I will be quickly corrected if this is a stupid idea, or if it has already been tried. My question is: has this idea been tried before? If not, are there good reasons it would not work, or ...
30
votes
8answers
5k views

Why must I have a “strong” password for sites like this? [duplicate]

I don't share any personal information with StackExchange, I'm not really worried about anyone trying to hack my account and I can't see any incentive for them to do so, and yet the password strength ...
4
votes
4answers
199 views

Using a password manager vs manual

was wondering, who still uses the traditional method of storing passwords (in envelope) in an actual physical safebox vs modern methods like password managers? what are the pros and cons of each ...
0
votes
0answers
45 views

Detection of pass the hash

I have researched about PTH Attacks but yet found any solid way detecting it in a network.is there a way to detect a pass the hash ? analysing the windows message from the dcs or something ?
1
vote
1answer
119 views

What is the right way to implement Keyed Password Hashing?

As mentioned in this wonderful link, the way to get a PBKDF2 Hash of a user given password given a password (of course), a salt (generated Cryptographically Secure Random Number Generator. iteration ...
2
votes
2answers
102 views

Who can actually see the password when I accidentally used ftp instead of sftp?

It has been said that if we accidentally use ftp instead of sftp, people can actually see the login name and password in pure text form, and it is very bad. But who can actually see it? Will it be ...
4
votes
1answer
136 views

What is the best way to store password in memory (RAM) in Java?

Imagine there is a login form in Java application. We need assign usename and password to variables. Moment after we can Hash or HMAC password and keep it just for authentication step (no caching). ...
18
votes
5answers
3k views

Does too long a salt reduce the security of a stored password hash?

Suppose we have passwords that are statistically 7-8 characters long. Is appending a 200 character long salt less secure than a 5 character salt, because of the similar hash function inputs? I was ...
5
votes
4answers
199 views

Are there any disadvantages to encrypting the password hash?

Is encrypting the password hash in database more secure than storing only the hash? Suppose we store encrypted SHA-256 result with AES instead of hash directly. Is this a good protection from a ...
0
votes
0answers
18 views

Cracking WPA2 using Intel HD Graphics GPU [migrated]

I use Linux Kali and yesterday have captured a WPA handshake of my network. I want to crack it's password - but my CPU with aircrack-ng checks only about 2000 keys per second. In my laptop I have got ...
2
votes
1answer
31 views

SIP Provider stores credentials, is it required for some SIP phones?

My SIP provider stores my SIP call time password as AES encrypted in stead of hashed. I understand that SIP authentication has the capability to NOT store the password, and in stead store a ...
2
votes
4answers
230 views

How effective are password checking websites? [duplicate]

I typed the following password in howsecureismypassword.net: yummy candy yummy It said it would take 100 billion years for a personal computer to crack. Is this accurate? Even though it has English ...
1
vote
2answers
94 views

Encrypted retrievable password

I have a password conundrum. I need to store an encrypted password in a DB table but in such a manner that would allow me to retrieve the password as plain text afterwards. Please note that this is a ...
15
votes
3answers
4k views

Is it possible to get the salt if I have the hash and original password?

Is it possible to get the salt if I have the hash and original password? My gut feeling is no, but would it be impossible or will it just take very long?
1
vote
2answers
54 views

bscrypt,scrypt v/s iterative SHA-x [duplicate]

Both bcrypt and scrypt hashing algorithms are designed to increase the resources required during the computation. Hashing passwords with these algorithms can be beneficial as it makes the task of an ...
2
votes
1answer
31 views

Feeding PBKDF2 to SRP verifier creation

There is an older game that solely uses UDP to communicate, and I wanted to add password authentication to the game to facilitate things like experience points and rankings. To this end, I decided to ...
4
votes
1answer
107 views

What is preventing us to start using scrypt in production ?

After a lot of reading the expert opinion on password hashing, I understand that scrypt (which is both memory hard and CPU intensive) is a good candidate for password hashing. But I saw the experts ...
2
votes
1answer
124 views

Key's random art image is mostly black

I have generated an SSH key on Ubuntu 10.04 with ssh-keygen -t rsa -C "example@example.com" and the key's random art image comes out mostly empty (modified slightly): +--[ RSA 2048]----+ | ...
1
vote
1answer
106 views

How to suspend a silent oberserver from Facebook account?

A friend of mine told me about the following problem: She used to login on Facebook on a computer of her boyfriend. After they broke up she recognized that he was able to login to her account from his ...
1
vote
0answers
86 views

Password automatically typed into user box on facebook [closed]

Just want to ask some questions regarding on this strange experience while logging on my account on Facebook There are cases that I'm accidentally typing my password into the username box of the ...
0
votes
1answer
94 views

How many passwords should I have? [closed]

So I am upgrading my personal security. Most passwords that I use are generated by and stored in a password manager. There are a few places where I cannot use a password manager -- here, I plan to ...
1
vote
1answer
113 views

Finding Plaintext Password Repositories [closed]

I came across a file, that was used by our tech support, to store all generic usernames and passwords in them for use with new systems. (Our company has been trained on the use of other Password ...
3
votes
1answer
636 views

Are passwords stored in the cookie? encrypted?

Whenever I connect to security.stack.exchange, I am automatically logged in. I haven't allowed the browser to store my password. When I delete all cookies stored by the security.stack.exchange, I have ...
8
votes
3answers
331 views

Security of pronounceable passwords

Some random password generators support the generation of pronounceable words of any given length n. Assuming that words are derived using 26 lowercase letters, the number of possible words of length ...
2
votes
1answer
129 views

How Windows Server 2008 Stores Local Users Passwords?

It is not clear to me how Windows Srver 2008 R8 stores local account passwords. Is there any salt added or just NT hash is computed and stored. The following article describes all the methods used by ...
2
votes
1answer
206 views

Is Google's password recovery by entering an old password a bad practice?

When you try and recover your password on Google, you will eventually stumble across this screen, and it made me wonder: Isn't this type of password recovery from Google essentially the same as ...
5
votes
2answers
209 views

SSH key auth, but still need password for sudo?

SSH with public-private key authentication comes enabled by default with most Linux distributions. This is great because when I create accounts for remote users I don't have to email them sensitive ...
3
votes
1answer
127 views

Regarding Windows password and Chromes Remember password Feature

Google Chrome browser helps in password management by prompting users to remember their passwords for the websites. These saved passwords can be accessed from the browsers "settings" menu, and to do ...