Dead Letters to Alice - Reachability of E-Mail Addresses in the PGP Web of Trust
Abstract
Over the last 25 years four million e-mail addresses have accumulated in the PGP web of trust. In a study each of them was tested for vitality with the result of 40% being unreachable. Of the mailboxes proven to be reachable, 46.77% turn out to be operated by one of three organizations. In this article, the authors share their results and challenges during the study.
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