>>I thought I remember reading somewhere that there are terms for applications that have User Name and Password for log in and others that have only Password. Anybody knows these terms?
>
>You would need to have uniqueness somewhere. So, assuming the later, if uniqueness is not enforced on the password, you could have two users having the same password and it wouldn't be possible to guarantee which users is in fact behind the keyboard.
>
>Usually, username is unique. So, with that, that resolves the issue.
I agree with you as far as uniqueness and so on. I have an app that for many (20+) years has been set to use only a password. So the password is unique for each user. The user name is non-essential. I want to change this so I have to explain to the customers. I thought I heard the term 'Single-something' and 'Double-something'; so I would explain that we are changing from 'Single..' to 'Double...' But apparently I am mistaken and such terms do not exist. So I will simply have to describe.
Thank you.
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