browser - Is there a way to uniquely identify a web user? -

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i want identify every anonymous person accessing web portal uniquely (crazy, know!). using session id in combination ip, however, since session id cookie based, can cleared , identity can forged. browsing other thread , had said attribute named "pcrsa" can obtained browsers , can used uniquely identify user. ever since, i've trying locate further info regarding pcrsa no avail. have info regarding pcrsa or alternatively, better way uniquely identify anonymous connections?


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