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
Mobile terminal device capable of more effectively utilizing operation portions, conductive portion, operation detecting unit, power supply unit, and signal processing unit
Method for determining an object class of an object, from which light is emitted and/or reflected to a vehicle
Milk frother
Software self-checking systems and methods
Automated macular pathology diagnosis in three-dimensional (3D) spectral domain optical coherence tomography (SD-OCT) images
Robot control device
Interposer having molded low CTE dielectric
  Randomly Featured Patents
Copper alloys with improved corrosion resistance and machinability
Applications for geographically coded access points
Fracture fixation
Method and device for condensed image recording and reproduction
Transesterification composition of fatty acid esters, and uses thereof
Pneumatic pressing system for a drafting frame of a spinning machine and method of operating same
Quadrant operator
Display apparatus having improved cursor enhancement
Method for calibrating signal propagation delay in network trunk
Solar heating system