But you know how 99% of websites are. One example is a web mail service - here email addresses are deemed potentially public. You'll have to determine if your security requirements dictate prioritizing them over the user experience. However, with most other systems this can be fixed by having the user's email address as their login username. http://btcherb.com/error-message/invalid-input-error-message.php
Why did my electrician put metal plates wherever the stud is drilled through? A simplistic method of looking up logins in a database might look something like (using :n for parameters supplied by the user): SELECT 1 FROM users WHERE username=:1 AND password=HASHING_FUNCTION(CONCAT(:2, salt)) There are other ways to enumerate usernames than log in page messages. In GMAIL context's, it's probably that gmail doesn't want people mining the existing email addresses to be used by spam robots.
They will ruin their UX with a generic error message, even though it doesn't give them any extra security. Using a brute force tool, it is trivial to try random names, and then when the error message changes, to start brute forcing that username. Your app could tell a user that "the requested username is unavailable" and not be specific as to whether it was already in use or just didn't meet your other username up vote 3 down vote favorite Is there any differences between the following two error messages from security point of view when users entered a wrong password?
I think this is a relic from old days and does not have place in today's scheme of things. –Dheer Jul 8 '14 at 6:47 Additionally, when you mistype None of my points are new or unusual. current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Error Message For Password Length Or I could just create a new user.
If the user has a typo in his username, but randomly matches another username, the corret Message would be "Wrong Username" because for the user it is a wrong username, even These sites often charge a low fee and have about 70% accuracy rate. One should show a generic message instead, like "Password or username are wrong". http://ux.stackexchange.com/questions/13516/how-to-tell-the-user-his-login-credentials-are-incorrect The link is usually near the password field, no need to go the "Register" detour. –basic6 Jul 9 '14 at 14:57 add a comment| 9 Answers 9 active oldest votes up
Your point is void. Login Error Message Best Practices You can reinforce a wall with 10 inch thick steel, but that won't help if there's an unlocked door in it. But as mentioned this is probably irrelevant for most modern applications –Falco Jul 8 '14 at 13:58 @Falco Well, either HASHING-FUNCTION is something like SHA-256 (which might be implemented One possibility is that it's a side effect of implementation.
oops, user name is already taken!" If that is implemented, it means means that probing the space of user ID's through this mechanism is severely rate-limited. http://support.brighthouse.com/Article/Invalid-Login-Password-Error-Message-1885/ Peter Land - What or who am I? Wrong Username Or Password Message How do spaceship mounted railguns not destroy the ships firing them? Either Your User Was Not Found Or Your Credentials Are Incorrect Miniclip Sometimes the computer is better at it than a human so it just provides an annoyance for your users. –Travis Pessetto Jul 7 '14 at 21:22 Making a decision
But, in concept, you are correct. http://btcherb.com/error-message/keep-getting-error-message-wii.php Want to make things right, don't know with whom Where are sudo's insults stored? Not as having access to the system, but to mine whatever is possible from their account: PII, account info, re-used passwords, etc. share|improve this answer answered Feb 17 '13 at 14:33 Mike C. 2,2361814 add a comment| up vote 2 down vote In some contexts you don't want an attacker to be able Login Failure Message Best Practice
Farming after the apocalypse: chickens or giant cockroaches? For account recovery, this would be the same form but the title would say something along the lines of Please enter your email address to generate a password recovery email. I could use the registration page to figure out the user name of an existing user by brute force. have a peek here Within some systems, username enumeration cannot be avoided as it is inherent to the nature of the application.
Non-generic messages would lead to a much better UX. Invalid Username Or Password Too Many Pattern Attempts On entering "Incorrect Username" it gives a message "This username is not taken ..." so much for security. Can you cast a quickened spell or power when its not your turn?
So sometimes it may just be laziness or a desire to go easy on the database, rather than a conscious security decision. I do agree with limited login attempts. –Travis Pessetto Jul 7 '14 at 21:31 add a comment| up vote 0 down vote I am trying to put my attacker hat on login passwords security share|improve this question asked Feb 17 '13 at 14:30 luin 764818 1 I'm sure if you tried the "can't access your account" trick a few thousand times Login Error Message Examples But will the random gmail user account likely have greater privileges than the ones you can create? –emory Jul 8 '14 at 11:45 1 Attackers tend to brute force accounts
Recruiter wants me to take a loss upon hire How does a migratory species farm? So what is the point about generic messages than? Interaction between a predictor and its quadratic form? http://btcherb.com/error-message/keep-getting-error-message-on-wii.php I think the error message: "The password you entered is incorrect" is more clear to users, And, What's more, it's very easy to check whether a username is exists on the
share|improve this answer answered Jul 7 '14 at 19:54 PwdRsch 6,08611526 3 If the site lets you choose a username (without the same advice in place as when choosing passwords) So unless the specified username doesn't exist, the system can't actually know if it was the username or password that was wrong. And ideally, a per-row salt. Cartoon movie with archery tournament with "paintball" arrows, people dressed as animals Specific word to describe someone who is so good that isn't even considered in say a classification Two Circles
Your site does not have a registration page. Do you accept any username/email address and say a message was sent even if that account wasn't in your database?
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