Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Secure teleconferencing system










Image Number 4 for United States Patent #4845749.

A secure audio teleconferencing system is disclosed. The secure teleconferencing system comprises a centralized facility or bridge to which a plurality of participants is connected. The role of the bridge is to receive encrypted message signals from the participants and to add the encrypted message signals, modulo some known number. The result is then transmitted to the participants. Each participant is able to decrypt the modular sum of encrypted message signals, to obtain the desired ordinary sum of clear text message signals. In accordance with the invention, the message signals remain encrypted throughtout processing by the bridge. There are no non-encrypted messages.








 
 
  Recently Added Patents
Method for culturing lactic acid bacterium and method for producing fermented milk
Method for specifying control curve parameters for controlling climatic environmental conditions of climate-controlled enclosed spaces
Multichannel device utilizing a centralized out-of-band authentication system (COBAS)
Correcting color plate data for mis-registration in a sub-scanning direction by performing a pixel transition at the transition point aligned in the main-scanning direction
Inverter, NAND gate, and NOR gate
Radio transmitter and radio receiver with channel condition assessment
Onium salt-containing polymer
  Randomly Featured Patents
Position-addressable polynucleotide arrays
Flyback modulated switching power amplifier
Apparatus for stripping electrical wires and the like
Video information playback method and video information playback apparatus
Optical relay imaging in the common pass annular laser amplifier
System and methods for assisting businesses in compliance with gas emissions requirements
Retro-reflective light diffusing display systems
Pivot mechanism for ejecting a cigarette contained in a cigarette case
Medicaments
Method and system for automated intelligent electronic advertising