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A comment on Columnist asked researchers what they could find out from just his cell number. Parent comment

Re:Columnist asked researchers what they could find out from... by grimjack00 on Thursday August 15, 2019 @11:19AM (#20705954)
But then, how does the account holder know which is the current one?
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Re:Columnist asked researchers what they could find out from... by swebs on Thursday August 15, 2019 @01:14PM (#20707292)
In theory, by remembering the last one you used.

In practice, by just marking the damn pages.

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Re:Columnist asked researchers what they could find out from... by theptip on Thursday August 15, 2019 @11:43AM (#20706185)
How does an account holder know what their password is?

(They remember it, or they write it down and store it with their other valuable pieces of paper.)

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