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

learn more… | top users | synonyms

1
vote
1answer
146 views

How secure is a password app that stores both the password and two factor secret in one place?

Take for example 1Password, that now can store your password and one time password secret in a single place (your 1Password vault). I know it isn't truly two-factor anymore, but how much better is it ...
0
votes
1answer
28 views

Is it worth it to implement both SHA2 and SHA3 at the same time?

I'm creating a password storage system for a web server I'm building for fun. Would it be more secure for me to use both SHA2 and SHA3 for hashing, and then store them in a database? If I use both ...
13
votes
6answers
1k views

Does prepending a salt to the password instead of inserting it in the middle decrease security?

I read somewhere that adding a salt at the beginning of a password before hashing it is a bad idea. Instead, the article claimed it is much more secure to insert it somewhere in the middle of the ...
1
vote
1answer
54 views

Give Someone Access to Secure Website? [on hold]

I have someone I hired on a Freelancing website working for me - so far he has worked for me for about two weeks and is doing a good job. In order for him to complete his work he will need access to ...
2
votes
0answers
23 views

General Entropy as opposed to Password Entropy [duplicate]

I know that the formula for the entropy of a message is: (I believe b can be set to 2) but when calculating the entropy of a password websites usually only compute log2(p-1), ignoring the first ...
0
votes
3answers
178 views

Why do banks still hack-up autocomplete=off functionality?

With Bug #1025703 in the latest Firefox 38, Mozilla has finally decided to stand up for its users instead of catering to the banks that don't want the passwords remembered. However, I've noticed ...
4
votes
1answer
103 views

Re-display password in registration form good or bad?

When a user tries to register and the data he submits are not right such as bad email, or weak password, we would display the registration page again to him with the data he just submitted along with ...
3
votes
3answers
129 views

Would requiring multiple passwords enhance security?

I assume that it was considered at one point, and that there's a good reason for not doing it, I'm just curious as to why. I'm sure that there are many people who struggle to remember a single ...
2
votes
1answer
91 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 ...
3
votes
2answers
268 views

Bad password policy at my bank?

I logged in to my bank tonight and was prompted that all customers were being forced to change their passwords for "security reasons". The policy for new passwords is 6 to 10 characters No special ...
5
votes
3answers
319 views

What steps can you take to make offline cracking of SRP harder?

In the aftermath of the Blizzard hack, what steps can I take to make offline cracking of SRP more difficult? My question assumes that your database is already gone and that you implemented SRP more ...
0
votes
1answer
51 views

Gnome-keyring iteration count location

I know that Gnome-keyring hashes master password between 1000 and 2000 times. It picks random number. I would like to ask where does it save this number, what is the location of that file? As far as I ...
0
votes
0answers
29 views

how to test clones site [on hold]

I want to find a vulnerability in a site which end in .aspx and this is what I have so far: The system server is IIS 7. System OS is Windows Server 2008. I have found a URL in site maybe its so ...
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?
5
votes
1answer
1k views

How does an attacker know when he has the password?

An attacker gets a list of hashed passwords. How does he know when he has cracked the password(s)? He can't try millions of times on the comprised account. Attacker gets hashed password. How does he ...
11
votes
4answers
20k 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 ...
2
votes
1answer
971 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 ...
0
votes
1answer
291 views

How can American Express Serve login be PCI-DSS compliant?

Today I went to log into my American Express Serve account at https://secure.serve.com/ and accidentally discovered what appears to be a huge hole in their login process. Here are the steps involved: ...
1
vote
1answer
86 views

Storing server generated passwords

There are some applications that generate passwords for you. Consider a case where you sign in via Facebook, the application (let's call it NEWAPP) verifies your sign in on the server using FB tokens ...
1
vote
1answer
32 views

how to get cookies from aspx site to use it with hydra

I've been playing around with Hydra and .aspx site and I've hit a bit of a snag - Hydra responds letting me know that the first 16 passwords in my password list are correct when none of them are. ...
0
votes
1answer
48 views

Windows Passwords

What are the security concerns of the following user account setups on a normal Windows 7/8/10 desktop machine compared to: Using a non-privileged account with a password and having an admin account ...
16
votes
2answers
8k views

Facebook API : App Secret - possible misuse

I've recently find out that by simple quick look into compiled code of one of our applications, you can get both App ID (API Key) and App Secret for Facebook API I suppose that we should really keep ...
1
vote
1answer
137 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 ...
9
votes
5answers
2k views

Gold Standard for password hashing

I've developing a web application that will be dealing with highly sensitive information and I want to ensure the hashing of passwords is gold standard. Ideally I'd go for per-user salted SHA512 ...
5
votes
3answers
153 views

Storing random initial (one-time) passwords in plain text

I manage a vendor app that issues accounts (with passwords, of course) to end users. From what I can see, final user passwords are stored properly. My concern is the initial account generation and ...
0
votes
1answer
28 views

QR-code based credential retrieval?

This is a sort of design review question that I'm hoping is suitable for this site. I am designing a system that uses a cloud service to establish a secure connection between a PC and a mobile ...
6
votes
4answers
542 views

Method to integrate Touch ID in iOS apps

With the recent announcement of Touch ID APIs for third party apps, I am wondering how can we leverage this feature to perform secure transaction ? I am looking for a method to use Touch ID in my ...
1
vote
2answers
68 views

Why is “\000” added to the end of passwords prior to hashing with bcrypt?

I am implementing bcrypt for java as found here. Before the actual hash takes place, line 455 of this implementation takes the raw String password, and transforms it into a byte array like so: ...
3
votes
1answer
220 views

How to find passwords in memory (password managers)

I’m trying to figure out if password managers such as last pass store passwords in plain text (or hash values that can then be decrypted with the master password) in memory after a user logs into the ...
13
votes
4answers
1k views

Why will Google no longer allow me to end or begin passwords with a space? [closed]

Why won't Google allow me to use a password ending in a space anymore? Backstory: I have memorized a cipher that allows me to generate a different and very strong password across many different ...
13
votes
8answers
8k views

Are services like “LastPass” less secure, as they have all my passwords protected by a single password?

If the LastPass service has all my passwords and someone gets access to my LastPass password, this person will have access to all my passwords. Isn't that bad for security?
4
votes
5answers
168 views

How many combinations does a specific password policy allow?

Recently I was arguing about password policies. Assume you have a policy which requires 10 characters and additionally at least one letter, one number and one special character. My companion was ...
-2
votes
0answers
44 views

Google “App Passwords” - Do these circumvent 2FA?

I recently discovered Google's "App Password" feature: https://support.google.com/accounts/answer/185833?hl=en I generated a password there and used it in a Python script to authenticate with Google ...
8
votes
3answers
1k views

How can I find if my password has been posted online?

I have just received this email from AbeBooks.com: Hello AbeBooks Customer, This is an important message from AbeBooks.com. As part of our routine security monitoring, we have learned ...
9
votes
7answers
26k views

Recommend Length for Wi-FI PSK?

I currently have a network set up with WPA2 and AES encryption, the password is 8 characters long but was randomly generated and contains no dictionary words. However I'm concerned about the ...
72
votes
9answers
10k views

New Gmail login system—going against conventional wisdom?

I noticed that the new gmail login asks for username first, and then confirms if such username exists, before asking for password input. Does this not go against conventional security wisdom to not ...
13
votes
3answers
2k views

Is it truly possible to store passwords securely, but be able to see the password?

Every place I looked, people recommended that storing passwords via encryption is like storing passwords in plain text. But every place I've looked, everyone recommends using a password manager like ...
6
votes
4answers
1k views

Store password using sha1 [duplicate]

I've been using the sha1() function to hash password before inserting it into my database. But I have this procedure so that it just won't be the password to be hashed. My page would register a user ...
4
votes
3answers
285 views

Best way to store/retrieve sensitive key files?

We have our web servers running in AWS EC2. We have about 30 API Keys/passwords/etc (sensitive data) which is set in the environment for our app to use. Whenever we deploy, we start a new server ...
18
votes
4answers
6k views

Deleting a Java Object securely

I know that in order to delete a Java object I should use character array instead of String, since I can safely erase (rewrite the character array with other data) its content. This seems not to be ...
25
votes
6answers
25k views

Most secure password hash algorithm(s)?

What is/are currently the most cryptographically secure hashing algorithm(s)? (available in PHP) Speed is irrelevant, because I'm iterating the hash over a fixed time (rather than a fixed number of ...
44
votes
6answers
6k views

How do some sites (e.g. online banks) only ask for specific characters from a password without storing it as plaintext?

I thought How can a system enforce a minimum number of changed characters... would answer my question, but it seems this is a different case. When I sign on to my online banking account, I'm prompted ...
1
vote
3answers
51 views

Sensitive issue regarding windows 8 password [closed]

Although I know this sort of request probably isn't exactly what stackoverflow is for, I am desperately seeking help. One of my best friends recently passed away and his parents asked me if I knew a ...
4
votes
3answers
628 views

Which passwords to exclude from a password manager?

The benefits of a password manager are clear. Still, it seems that there might be a case to keep at least some passwords out of it: Your primary e-mail, to minimize the "single point of attack" ...
2
votes
1answer
77 views

How to implement application-specific passwords using strong hashes?

I am implementing a service where application-specific passwords seem a good choice to improve security. A question on why and when they might make sense has already been discussed here Google ...
1
vote
1answer
86 views

How can one know if the password database on the server is stolen or not?

There are many password breaches happening now a days. How can the system administrator detect if the password database on the server is hacked? Obviously, the admin can know once the password ...
1
vote
1answer
123 views

Lock Windows to a specific app

Is it possible, using some program or application, to lock Windows 7 so only a specific app can be used, for example Word, until a password is entered? Thanks!
1
vote
1answer
47 views

Where to store hashes, salts, keys in Desktop Applications

I am trying to figure out where or how i should store application secrets and keys inside a desktop application. For example a facebook app key or dropbox key and secret. So I've read that i should ...
2
votes
3answers
110 views

Can I initially hash passwords with SHA instead of hashing them with bcrypt to decouple requests from slow crypto functions?

I'm using bcrypt for some web service requests that hash multiple passwords. The problem is that these web service requests can take minutes to complete due to bcrypt. Not very user friendly. My ...
1
vote
1answer
76 views

How is the username and password captured on this mobile device?

I have a Motorola phone, and I am concerned about my privacy after reading this article : http://www.beneaththewaves.net/Projects/Motorola_Is_Listening.html The poster says: For both of these ...