[Chang]

Originally Posted by Doitsu

I'll investigate this and update the plugin, if necessary. In order to reproduce the problem I need to know which encryption method you used: Adobe or IDPF and whether this was an epub2 or epub3 book.

This EPUB 2 ebook was exported from InDesign 19.4 and here's the encryption.xml of the ebook:

<?xml version="1.0" encoding="UTF-8"?>
<encryption xmlns="urn:oasis:names:tc:opendocument:xmlns:container" xmlns:enc="http://www.w3.org/2001/04/xmlenc#">
  <enc:EncryptedData>
    <enc:EncryptionMethod Algorithm="http://www.idpf.org/2008/embedding"/>
    <enc:CipherData>
      <enc:CipherReference URI="OEBPS/font/NotoEmoji-Regular.ttf"/>
    </enc:CipherData>
  </enc:EncryptedData>
</encryption>