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→What you need to do in order to attend
medium such as email. This only works, however, if you have some method of
verifying that the other party is indeed who they claim to be. This problem
is solved through keysigning: you are verifying first -hand that the otherparty's identity and key match , as well as declaring this to anyone who
trusts you. These interconnected chains of verification form a web of trust
and allow secure communication between previously unacquainted or unverified