US 5,970,095 A · Secure data transmission on a TDM isochronous network

Abstract

A secure method for transmitting data on an isochronous network in which data is spread in successive frames in a manner known to the sender and receiver but unknown to other nodes on the network. In one embodiment, some or all bits which comprise a byte are transmitted in different channels (i.e. time slots) so that the bits which comprise a byte are spread over several channels in a pattern known to the sender and receiver but not to unauthorized parties on the network. This bit spreading can be performed in real time and without latency or performance problems. In another embodiment, the channel or channels assigned for communication between two nodes on the network change in a sequence known to the sending and receiving nodes but not known to unauthorized parties.

Claims2

Dependent claims

A method for secure communication between a sender and a receiver on a network using a time division multiplex isochronous protocol in which the network allocates individual channels on a time slot basis within each isochronous frame of data transmitted on said network including the steps of:

assigning a plurality of said channels in each said isochronous frame for communication between said sender and said receiver;
transmitting some but not all bits of a first data byte in one of said plurality of channels in each said isochronous frame assigned in said assigning step, and some but not all bits of a second data byte in another of said plurality channels in each said frame assigned in said assigning step in a pattern of channel allocation known to the sender and receiver.

Dependencies are inferred from the claim text.

Secure data transmission on a TDM isochronous network

Life of this patent

Secure data transmission on a TDM isochronous network

Life of this patent

Abstract

Claims2