Patent ID: 6272640
Filing Date: 2001-08-07
Classification: H04L

Abstract:
A security management device for providing secure data communication between a plurality of transceivers, the transceivers being coupled to ports on a communications network device, the data communication including at least one data packet having a source address, a destination address and a length field, the security management device being operatively coupled to the communications network device, the security management device comprising:(a) a first memory to store a source address of at least one of the transceivers connected to the communications network device;(b) a security management controller, coupled to the first memory, to compare the destination address to the source address of the at least one transceiver stored in the first memory; and(c) a security jamming device, coupled to the security management controller, to jam the data communication to the transceiver having the source address not matching the destination address in the data packet wherein the security jamming device stores an invalid symbol into the length field of the data packet, and the invalid symbol unambiguously indicates to the transceiver that the data communication is invalid.