Patent Number: 6,297,729

Title: Method and apparatus for securing communications along ac power lines

Abstract: A power line communications system including a power line for supplying ac power; a power source connected to the power line at one end; and a communications network having a plurality of devices, the devices connected to the power line at another end for (a) receiving ac power and (b) communicating information. The system also includes a security firewall coupled between the one end and the other end of the power line for securing the communications information. The security firewall passes the ac power without attenuation, but blocks the communications information from passing. The security firewall also prevents passage of interference to the communications network. In this manner a secure and interference-free communications network is established.

Inventors: Abali; Bulent (New York, NY), Franke; Hubertus (Cortlandt Manor, NY), Giampapa; Mark E. (Irvington, NY), Pattnaik; Pratap C. (Ossining, NY)

Assignee: International Business Machines Corporation

International Classification: H04L 29/06 (20060101); H04B 3/54 (20060101); H04L 12/10 (20060101); H04L 12/22 (20060101); H04M 011/04 ()

Expiration Date: 10/02/2018