Encryption AirPrint

I've got some questions about the Security and TLS encryption of AirPrint.

First of all, are there any technical Documentation of the security measures in the AirPrint Document. The only thing I've found is this presentationand the corresponding slides.

As far as I understood the data transfer between the Client and printer is end to end encrpyted with TLS if the printer supports TLS for AirPrint. What happens if I use an older printer? Is the transfer then unencrypted, is printing without TLS not supported or do I get a warning before using AIrPrint without TLS?

How can I make sure all my printers support end to end encryption via TLS for AirPrint?


Thank you in advance.


Kind Regards

ijuuuus72