confirmation that a user is who they claim to be, either by verifying what they know (password), what they have (a key) or what they are (fingerprints).

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27
votes
8answers
13k views

How to tell the user his login credentials are incorrect?

When a user has entered incorrect details into a login form, is it better to tell them: The username or password you have entered is invalid. or The user name you have entered is invalid (for ...
61
votes
11answers
9k views

Should users be allowed to use any special character they want when creating a password?

I came across a number of login configuration settings where there is a list of allowable special characters and was wondering: Does this limitation cater for a specific security or usability need? ...
27
votes
6answers
2k views

Forcing users to use a particular pattern for passwords

Many websites, specially government ones, enforce users to use a password which conforms to particular criteria. For example: use between 8-13 characters with at-least one integer and one capital ...
5
votes
10answers
620 views

Is there any advantage of signup before login with social plugins?

I am building a site and was thinking about if there should be a signup option at all. I found the question about the difference between sign up and log in with Facebook/Google/etc but there was ...
4
votes
3answers
438 views

Is offering more than one openid/social-sign-in option a good idea?

Lots of sites nowadays offer the option to log in via Google, Facebook, LinkedIn and so on, and sometimes a standard username/password option as well. While this goes a long way toward helping users ...
20
votes
5answers
1k views

Whats more user friendly local authentication or remote authentication (OpenID, OAuth)

from a usability perspective only (not security) what do users find more comfortable A site with it's own login page (need to sign up but then easier to login) or a site with remote authentication ...
4
votes
4answers
265 views

Business application: Is it better to redirect or pop-up for re-authentication?

This question is geared for a line of business application someone would pay for, not a general public facing website. Is it better to redirect for authentication/re-authentication or show a pop-up? ...
10
votes
5answers
699 views

Why would you, for a local authentication site, have usernames, instead of using e-mail address to login?

In websites where authentication is local, or mixed local and remote (e.g. OpenID), I still often see the question for a username. I can very well understand this in the case of twitter, where the ...
6
votes
4answers
264 views

How many atempts should you give a user before invalidating his password?

What I am trying to avoid here is brute force attacks on a user's password. And I am thinking about doing that by invalidating his password when too many attempts are made in the same minute, hour, ...
4
votes
2answers
180 views

How to request a third-party login within a seperate mobile application

I'm designing a mobile app that requires the user to log-in with their LinkedIn account. I feel I might have cluttered too much info into it, but everything seems to be important. I want the user ...