a security mechanism so that it's that to make sure that it's your mobile phone which from which the information was sent and also when sending this this when issuing this warning of course the notification needs to be sent to a server but again this is done without the detailed contact data but also only using anonymous data how many users have downloaded the app so far we have roughly 600 K so 600,000 downloads and yeah that's where we are of course we hope for more and we hope that the usage will significantly increase once the