passwords

I am learning Rails, at the moment, but the answer doesn't have to be Rails specific. So, as I understand it, a secure password system works like this: User creates password System encrypts password with an encryption algorithm (say SHA2). Store hash of encrypted password in database. Upon login attempt: User tries to login System creates hash of attempt with same encryption algorithm System compares hash of attempt with hash of password in the database. If match, they get let in. If not, they have to try again. As I understand it, this approach is subject to a rainbow attack — wherein the

Is there any Qt-built-in method to warn user (with pop-up window) that CapsLock is switched on while password field is active? I am currently using QLineEdit (is it good?) with setEchoMode(QLineEdit::Password) . once the user presses a key, you should check if the it's upper case AND if the shift is being held. if shift is not held,and the input is uppercase,caps lock is on. also if shift is down,and the input is lowercase,caps lock is on too. A post from Veronique Lefrere on the QT Interest mailing list has an answer, if you can wait for the user to press a key: wait for Qt::Key_CapsLock type

I want to force a user to choose a strong password on registration. I know, there are many jquery password strength meters out there, and I will most probably use one of them, too. But that does not really enforce anyone to choose a strong password. The registration form must also be useable without js enabled, so one could still potentially register with a weak password. Accounts must be most secure, because if you are logged in, you can see data of other accounts, which I do not want exposed under any circumstances. So I want to go for maximum security here, therefore I think, it is most

Although this is focused on Windows Phone 7, I guess the principle is universal. I would like to have a password protected zone within my app. However, my application is completely offline and so I will have to store credential details on the phone. My initial idea is to store a hash of the password and the salt. Would this be the best way to go? If so, should the hash and salt be stored in plain text, or is there a way to ensure that even they are encrypted? I understand that having the entire scheme on the phone will eventually be cracked, but what would be the best way to raise the barrier?

How do I make a simple password encryption to go into a database please? I need this to keep my job! Basially I need the code to do something like: EDIT I have a MySQL Table called "Usernames" on my local PC. It has the following columns: ID Username Password Account Type This table is used to log into the application, and I am in need of a secure way of storing the password. Can anyone help? In future, I'd suggest you refrain from begging for answers without first showing some code you've tried. That being said, I'll bite. import java.security.MessageDigest; import java.security

how should i store user credentials in my app i'm creating for myself? i'm not setting up any servers i'm just installing the app directly to my phone via USB. what i'm trying to do is have myself enter a username/password to associate to the account, basically the same as most other apps. the only difference is i'm not setting up any servers since i'm new and would have no idea how to do that. so with this in mind could i get away with storing in a database and pulling the info from there, or, as i'm sure of, is there an easier way to do this provided by android? note: i am very new and am

Well, I have always seen (and following) people saying to use hashing mechanism for storing passwords in database. I am really concerned is it secure? Lets go with example. Let's say I am hacker and I got your database name, id and password. Now I have FULL access to your database. What people say passwords should be hashed because if someone hacks, they are visible to hackers. so If I run query as select id, password FROM userDetails I will get data as below Option 1 : Without hash ++++++++++++++++++++++++++++ + id + password + ++++++++++++++++++++++++++++ + id01 + password01 + + id02 +