Is there a way to have the authentication answers in the admin pages show up encrypted?

Go to the debug pages and edit the User Form - Question Library:

Change the following section:

<Field name='waveset.questions[$(name)].answer' type='string' displaytype='text'>

  <Display class='Text'>

    <Property name='title'>

      <expression>

         <ref>waveset.questions[$(name)].question</ref>

      </expression>

    </Property>

  </Display>

</Field>

To look like this:

<Field name='waveset.questions[$(name)].answer'>

  <Display class='Text'>

    <Property name='title'>

      <expression>

        <ref>waveset.questions[$(name)].question</ref>

      </expression>

    </Property>

    <Property name='secret' value='true'/>

  </Display>

</Field>