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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25
votes
8answers
10k 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 ...
5
votes
10answers
455 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
413 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 ...
58
votes
11answers
8k 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? ...
26
votes
6answers
1k 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 ...
4
votes
4answers
252 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
650 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
227 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
174 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 ...