| 6035400 |
Information processing device and electric device |
| Mar-7-2000 |
An information processing device 10 comprises a ROM 12 which stores a reference code indicative of a predetermined area, a site code forming unit 14 which forms a site code of a measuring point, based... |
| 5987136 |
Image authentication patterning |
| Nov-16-1999 |
Apparatus for producing a self-authenticating visual image of a selected view, using a digital image forming means, such as a digital camera, together with a position determining system that provides position... |
| 5982897 |
Selective denial of encrypted high precision data by indirect keying |
| Nov-9-1999 |
High precision transmitted navigational data as encrypted data transmitted by global positioning (GPS) satellites is made unavailable in regions designated as hostile and during desired intervals, while... |
| 5907620 |
Method and apparatus for enforcing the use of cryptography in an international cryptography framework |
| May-25-1999 |
A cryptographic framework consists of four basic service elements that include a national flag card, a cryptographic unit, a host system, and a network security server. Three of the four service elements... |
| 5898680 |
System for providing location-specific data to a user |
| Apr-27-1999 |
An FDMA/TDM satellite-based digital broadcast system is used to provide digital maps and other types of data to users at remote locations. User selection of the desired data is achieved by monitoring the... |
| 5822429 |
System for preventing global positioning satellite signal reception to unauthorized personnel |
| Oct-13-1998 |
A selective or tailored system for denying global positioning satellite (GPS) signal reception to unauthorized GPS receivers yet enabling authorized receivers to maintain access to the GPS system. The... |
| 5799082 |
Secure authentication of images |
| Aug-25-1998 |
Apparatus for capturing and authenticating a visual image of a selected view, using a digital image forming means, such as a digital camera, together with a position determining system that provides position... |
| 5799083 |
Event verification system |
| Aug-25-1998 |
An event verification system comprises an input for the reception of information and an encryption algorithm to encrypt the information; an electronic recorder to record the encrypted information and a... |
| 5790074 |
Automated location verification and authorization system for electronic devices |
| Aug-4-1998 |
A system for remotely and automatically verifying the location of an electronic device and authorizing operation of the device if it resides in an allowed geographical location. The system includes a remote... |
| 5781628 |
System and method for selective restriction of ciphering |
| Jul-14-1998 |
A system and method for selectively restricting wireless ciphering communications within a telecommunications system is disclosed. A ciphering database contains flags corresponding to the ciphering restrictions... |
| 5764770 |
Image authentication patterning |
| Jun-9-1998 |
Apparatus for producing a self-authenticating visual image of a selected view, using a digital image forming means, such as a digital camera, together with a position determining system that provides position... |
| 5757916 |
Method and apparatus for authenticating the location of remote users of networked computing systems |
| May-26-1998 |
A method and apparatus for authenticating the identity of a remote user entity where the identity of such user entity is authenticated by use of information specific to geodetic location of the user entity... |
| 5754657 |
Authentication of a message source |
| May-19-1998 |
Methods for authentication or validation of the location of a putative source (ps) of a message, using time varying location determination (LD) signals that are received from J sources (J>1) of LD signals... |
| 5712973 |
Wireless proximity containment security |
| Jan-27-1998 |
A personal computer system has security features enabling control over access to data retained in such system. The system cooperates with a transmitter of radiation having a predefined characteristic.... |
| 5659617 |
Method for providing location certificates |
| Aug-19-1997 |
Methods and apparatus for providing location certificates to certify the position or location of an object are disclosed. The position of the object is computed using radio signals and the secure transmission... |
| 5651068 |
International cryptography framework |
| Jul-22-1997 |
A cryptographic framework consists of four basic service elements that include a national flag card, a cryptographic unit, a host system, and a network security server. Three of the four service elements... |
| 5640452 |
Location-sensitive decryption of an encrypted message |
| Jun-17-1997 |
A system for assuring the location integrity of a decryption chip used to receive and decrypt encrypted signals ES received from an encrypted signal source. The decryption chip operates in association... |
| 5621793 |
TV set top box using GPS |
| Apr-15-1997 |
An integrated receiver decoder (IRD), commonly called a set-top box, has a global positioning system (GPS) receiver. The GPS receiver checks to see if the IRD is at an authorized location and allows descrambling... |
| 5610984 |
Optimal L2 tracking in a SPS receiver under encryption without knowledge of encryption timing characteristics |
| Mar-11-1997 |
The optimal design of the SPS Receiver is disclosed. The optimal SPS Receiver includes the digital filter with adjustable characteristics in each digital processing channel. The optimal design of the SPS... |
| 5544321 |
System for granting ownership of device by user based on requested level of ownership, present state of the device, and the context of the device |
| Aug-6-1996 |
The present invention describes a method for superimposing prespecified locational, environmental, and contextual controls on user interactions, including interactions of mobile users, with computational... |
| 5535431 |
Method of detecting unauthorized use of a communication unit |
| Jul-9-1996 |
Unauthorized use of a communication unit 102 in a wireless communication system 100 may be prevented by determining the location of the communication unit 102 each time it transmits an affiliation request... |
| 5535278 |
Global positioning system (GPS) receiver for recovery and tracking of signals modulated with P-code |
| Jul-9-1996 |
Method and apparatus for improving the speed and accuracy of processing signals from global positioning system (GPS) receivers by ensuring access to GPS carrier signals that have been modulated with an... |
| 5506904 |
System and method for transmitting and receiving variable length authorization control for digital services |
| Apr-9-1996 |
Authorization information, such as blackout and spotlight regions, circular blackout and spotlight regions, and tier pointers, may be transmitted from an encoder to a decoder in a plurality of sessions... |
| 5493283 |
Locating and authentication system |
| Feb-20-1996 |
A system for locating any mobile body of a plurality thereof within a predetermined environment, wherein each mobile body carries a transmitter (10 to 18), each transmitter producing a unique identifying... |
| 5351294 |
Limited broadcast system |
| Sep-27-1994 |
A method and apparatus for carrying out limited encipherment broadcast by generating a cipher key obtained from destination information added to service information are provided. An information service... |
| 5243652 |
Location-sensitive remote database access control |
| Sep-7-1993 |
A communication system includes a remote mobile node which acquires time-correlated data of its actual position from a global positional system (GPS), and securely transmits the information as a position... |
| 5208855 |
Method and apparatus for irrigation control using evapotranspiration |
| May-4-1993 |
The invention bypasses a need for human participation in the process of remotely controlling irrigation sprinklers using Evapotranspiration (ET) values. In one embodiment, a transmitter broadcasts updated... |
| 5121430 |
Storm alert for emergencies |
| Jun-9-1992 |
A geographically specific emergency alert system includes a code generator unit in which geographic areas to be alerted and types of severity of alerts are selected and code strings generated to represent... |
| 4993067 |
Secure satellite over-the-air rekeying method and system |
| Feb-12-1991 |
A secure satellite over-the-air rekeying method and system are shown. This system provides a geometric filter for allowing message input to a satellite from ground stations having a particular predefined... |
| 4989245 |
Controlled authorization of descrambling of scrambled programs broadcast between different jurisdictions |
| Jan-29-1991 |
A control system and a corresponding method for controlling descrambling within a plurality of jurisdictions of scrambled programs broadcast from at least one of said jurisdictions. The control system... |
| 4972431 |
P-code-aided global positioning system receiver |
| Nov-20-1990 |
Method and apparatus for use in a global positioning system (GPS), to obtain the benefit of L2 carrier signals and precise-code (P-code) signals transmitted from satellites in encrypted form. Received,... |
| 4860352 |
Satellite communication system and method with message authentication suitable for use in financial institutions |
| Aug-22-1989 |
A satellite communications system apparatus and method for authenticating data transmissions uses the position of the transmitter, which position is determined by the satellite communications system. The... |
| 4802216 |
Interrogator and transponder test equipment |
| Jan-31-1989 |
Test equipment is described for testing a transponder and an interrogator positioned in close proximity to one another to cause suppression of its receivers while either transponder or interrogator is... |
| 4397034 |
Low probability of intercept transmitting apparatus |
| Aug-2-1983 |
A system for transmitting desired information is provided which has a very low probability of being intercepted. The system combines a well known narrow bandwidth directional antenna for limiting the interception... |
| 4077005 |
Secure position identity and time reporting system |
| Feb-28-1978 |
A system for identifying ships and aircraft, both in position and time, uizing shipboard cryptographic equipment and satellites is described. |
| 4024538 |
Electronic file and record keeper for secondary radar targets |
| May-17-1977 |
A warning is provided when a responding IFF target fails to satisfy friencceptance criteria in response to a given number of cryptographic interrogations. Target position information is utilized to aid... |
