Nothing. Also nothing is stopping anti-virus companies from making their software detect the &quot;Bundestrojaner&quot; as soon as they have learned to recognize it. They have done this with the previous version, too:<p><a href="https:&#x2F;&#x2F;www.avira.com&#x2F;en&#x2F;support-for-home-knowledgebase-detail&#x2F;kbid&#x2F;1074" rel="nofollow">https:&#x2F;&#x2F;www.avira.com&#x2F;en&#x2F;support-for-home-knowledgebase-deta...</a> (2011)