Method and system for the mutual encyphered identification...

Method for coded data transmission in half-duplex operation...

Method for compensating for capacity overload in a spread...

Method for cryptographic transmission of speech signals and...

Method for embedding information in modem handshake...

Method for improving message reception from multiple sources

Method for interchanging n partial bands

Method for point-to-point communications within secure...

Method for secure communication

Method for synchronizing code machines which are operated...

Method for the interference-resistant transmission of...

Method for transmitting information using chaotic signals

Method for transposing the frequency of sub-bands

Method for transpoting sub-bands

Method of and apparatus for interception-protected...

Method of and apparatus for transmitting clandestine radio...

Method of and system for safeguarded transmission of digital...

Method of confirming user in modem communications and its...

Method of distributing and utilizing enciphering keys

Method of protecting proprietary rights in works of authorship