Method and apparatus employing an invalid symbol security jam for communications network security
US6272640A · kind A · utility
21Cited by
7References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1999 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Sep 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A security device for use in communications network devices, such as multi-port repeaters, in local area networks to prevent eavesdropping by overwriting the data with an invalid symbol in the data communication packets transmitted to all unintended transceivers connected to the communications network device. Confidential or user sensitive information is not conveyed to the unintended transceivers since the invalid symbol is defined independent of the data. The invalid symbol unambiguously informs the unintended transceivers that the data in the data packet is invalid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.