<?xml version='1.0'?>

<reference anchor='RFC0644'>

<front>
<title>On the problem of signature authentication for network mail</title>
<author initials='B.' surname='Thomas' fullname='Bob Thomas'>
<organization>Bolt Baranek and Newman (BBN), TENEX</organization></author>
<date month='July' day='22' year='1974' />
<abstract>
<t>This note describes the problem of signature authentication for network mail, presents a general approach to the problem and proposes a specific implementation of that approach.</t></abstract></front>

<seriesInfo name='RFC' value='644' />
</reference>
