This is a currently standard situation of identity management: it involves, for instance, telling a customer number to a telephone operator of a mail order company; typing in a pin code at the bank or ATM; the combination of username and passwords to access online services. This form of authentication is increasingly problematic because of the ever larger set of online transactions where authentication through a password is required. IT-consultant Calum McLeod coined the term password overload syndrome to describe that we all have too many pincodes and passwords to remember. There are various commercial password managers, like 1Password or Password Safe that enable their customers to store all their different passwords, and unlock them on every online platform they use, for every service they want through entering one master password.
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