The messages you send do not have digital signatures that are checkable by a third party. Anyone can forge messages after a conversation to make them look like they came from you. However, during a conversation, your correspondent is assured the messages are authentic and unmodified.
<p>To store your OTR keys and <i>Pidgin</i> settings across different Tails sessions, you can turn on the [[Pidgin Internet Messenger|persistent_storage/configure#pidgin]] feature of the Persistent Storage.</p>