On keys, trust, and webs

The combination of name with email address, however, is usually unique. In cases of doubt, it's usually not hard to check that a person can receive an email sent to the address they claim. Of course, if this isn't actually done, then it does add a factor of doubt to key-signing parties. In many cases (where people already know each other online) it isn't hard to establish that the email address corresponds to the person.