> Dec have a box called a DEC 900TM. The utp ports on this repeater have a nice
> feature that when enabled (per port) encrypts all incoming traffic not designed
> to the machine attached to the port. So all traffic to the other machines that
> appears on this port cannot be easily seen (I cannot vouch for the security of
> the encryption used. A good Question for Digital (-:)
I know that 3Com hubs can do that, and someone told me that
HP has this feature too. But I don't think there's encryption
involved. Box just learns MAC addresses behind each host. Frame goes
in clear to real recipient, but others get just random bits.
(You have to send something to other hosts, because in ethernet
ethernet only one host can send in one time).