Resources Contact Us Home
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
Cantilever of scanning probe microscope and method for manufacturing the same, method for inspecting thermal assist type magnetic head device and its apparatus
Method of producing probabilities of being a template shape
Fringe field switching mode liquid crystal display panel
Real-time pricing of shipping vendors
Method and an apparatus for processing an audio signal
System and method for stranded file opens during disk compression utility requests
Synergistic compositions for the treatment of topical viral infections
  Randomly Featured Patents
Antifungal substances and process for their production
Safety device for telecommunication equipment
Card and newspaper display stand
Modular variable reflectance mirror assembly
Stereo optical system pair for stereo endoscope system
Microwave powered aircraft
Preparation of improved catalyst composition
Method and arrangement for preconditioning in a destructive read memory
Paper towel holder
Indexable cutting bit and cutting bit holder