| 4145568 |
Method and apparatus for ciphering and deciphering messages |
| Mar-20-1979 |
Method and apparatus for ciphering and deciphering messages, wherein series of cipher pulses with an identical pulse distribution are generated by the transmitter and the receiver stations and said pulse... |
| 4133973 |
Digital cryptographic system having synchronous and asynchronous capabilities |
| Jan-9-1979 |
The specification discloses a digital cryptographic system wherein each of the transmitting and receiving units includes a housing having a front panel. A push-button switch input array is mounted on the... |
| 4020285 |
Voice security method and system |
| Apr-26-1977 |
The specification discloses a voice scrambler technique wherein a voice signal is split into a plurality of discrete frequency sub-bands. A random code generator generates a randomized sequence of digital... |
| 4013837 |
Voice security method and system |
| Mar-22-1977 |
The specification discloses a voice scrambler technique wherein a voice signal is split into a plurality of discrete frequency sub-bands. A random code generator generates a randomized sequence of digital... |
| 3991271 |
Voice security method and system |
| Nov-9-1976 |
The specification discloses a voice scrambler technique wherein a voice signal is split into a plurality of discrete frequency sub-bands. A random code genertor generates a randomized sequence of digital... |
