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

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2
votes
3answers
96 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 ...
1
vote
2answers
285 views

Should I decode a base64 password before hashing for storage?

My server gets base64 encoded passwords from the client, and I am going to hash them for storage in a credentials table. Should I decode the password and hash the clear text password, or just hash ...
-2
votes
2answers
63 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
372 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
vote
1answer
67 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
277 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 ...
3
votes
3answers
269 views

If I use a good Master Password in Firefox, is security improved when I Remember Passwords instead of re-type?

In the old days I would emphasize that people should not select the remember passwords option because (besides the fact you tend to forget what the browser remembers) a bad guy could could display the ...
-1
votes
1answer
673 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?
-1
votes
2answers
113 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.
2
votes
1answer
123 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
84 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 ...
4
votes
2answers
134 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 ...
0
votes
2answers
516 views

How does Authy works?

I think I knew how does two-factor authentication works. I enter the password. Server generate random number and send me it me by sms. I enter this number. Server check number I entered with ...
1
vote
0answers
57 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 ...
9
votes
4answers
440 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 ...
3
votes
1answer
199 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
74 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
92 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
91 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 ...
2
votes
1answer
75 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 ...
0
votes
1answer
128 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. ...
1
vote
3answers
143 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. ...
3
votes
1answer
106 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
vote
0answers
20 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 ...
28
votes
7answers
1k 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 ...
3
votes
1answer
254 views

Salt usage for Spring security?

I use the Spring security for Java web applications and I have written an authenticationprovider which is working without salt and now I want to either add salt or alternatively use the builtin ...
4
votes
1answer
62 views

Does the Oracle Database Built-in Password Protections prevent pass-the-hash or replay attacks?

Does the Oracle Database Built-in Password Protections prevent pass-the-hash or replay attacks? Reading the "What Are the Oracle Database Built-in Password Protections?" from ...
4
votes
1answer
78 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 ...
2
votes
0answers
76 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
75 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
78 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
votes
2answers
112 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?
6
votes
2answers
382 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
3answers
251 views

Can't brute force password cracking somehow be throttled?

Online articles mention the importance of a strong password and suggest that hacking tools allows bad guys to attempt millions of passwords per second. I am wondering why OSes and websites and such ...
5
votes
2answers
263 views

TPM- Symmetric key storage

I understand that the TPM can be used to store an unlimited number of keys. However I am left with a few questions: Presuming the TPM is connected on the LPC what protects the data travelling across ...
0
votes
3answers
198 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 ...
1
vote
3answers
215 views

Should I trust my bank after this [closed]

I have just discovered that I can login to my bank with passwords that is not mine. Example: My password is "1234" but I am authorized with all possible post characters. For example "12345" or ...
11
votes
5answers
602 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 ...
-4
votes
2answers
185 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: ...
1
vote
3answers
316 views

Why not hashing and salting passwords?

When I was implementing my webapp, I decided to hash and salt users' passwords in order to protect them, even though I knew that there will never be a lot of them ... if any. Of course, I'm not saying ...
3
votes
2answers
156 views

Rainbow Tables: What is the Reduction Used for?

This is a follow up from this answer. The answer is very good, and it put me to thinking and doing some research. I have found another good explanation on this site. At some point, the author says: ...
0
votes
3answers
263 views

Authenticate user without knowing their password

I'm working on a project where each each user will have a public/private RSA key-pair. Users will be able to send encrypted messages to each other using the each target user's public key so that only ...
0
votes
1answer
125 views

Rainbowtable - Start with plain text [duplicate]

I know how to use rainbow tables. I've already read the other questions this topic here. Well but there is still one question left. As an attacker, I usually have a hash value of a password and ...
2
votes
3answers
2k views

A low tech yet secure way to keep track of passwords?

I use LastPass and love it. My girlfriend creates her own long, complex, unique, and thus difficult to remember passwords for every site. She frequently forgets them and has to rest the password. ...
7
votes
6answers
299 views

City Government Emailing User Name and Password

My city has online billing for utilities. When you set up an account they email your user name and password to you. You can't change your password without them emailing it to you again. Isn't this ...
3
votes
2answers
337 views

Does bcrypt compare the hashes in “length-constant” time?

I saw this function slowEquals() while reading Salted Password Hashing - Doing it Right, which uses a byte-level xor comparison to avoid timing attacks. I was wondering whether this is what Bcrypt ...
0
votes
2answers
140 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
votes
1answer
139 views

company is sending md5 string via GET['password'] dangerous?

So, this big, reknown company (you all heard off) is sending md5 encrypted strings (with GET key: password) over HTTP. I accidentally came over it since I wanted to use jnlp on a non-windows ...
-1
votes
1answer
88 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, ...
4
votes
5answers
506 views

Use the hash of the password to encrypted password

I have a app which transmit the password in clear text. I was planning to use the hash of the password (SHA-512) as the key for encrypting the plain text password. Then send the encrypted text to the ...