Communication control section for facsimile equipment having a secure communication function
US5241595A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1991 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Jun 25, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A facsimile equipment including a memory for storing a cipher key data, ten number keys for inputting the cipher key data, a DTMF signal receiving circuit for converting a DTMF signal received through a telephone line into the cipher key data, a controller for controlling the memory to selectively store the cipher key data input by means of the ten number keys or the cipher key data converted by the DTMF signal receiving circuit, a DTMF signal generating circuit for converting the cipher key data stored in the memory into a DTMF signal and generating this DTMF signal to the telephone line, and a controller for scrambling an image data to be transmitted with the cipher key data stored in the memory to provide the transmission data and for descrambling the scrambled image data received with the cipher key data stored in the memory to provide the reception data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.