Clark Memorial Hospital Urgent Care 130 Hunter Sta Way STE 101, Sellersburg, IN 47172 (812)2464808 (phone), (812)2464807 (fax)
Education:
Medical School University of Louisville School of Medicine Graduated: 1986
Languages:
English
Description:
Dr. Simpson graduated from the University of Louisville School of Medicine in 1986. He works in Sellersburg, IN and specializes in Emergency Medicine and Urgent Care Medicine. Dr. Simpson is affiliated with Clark Memorial Hospital.
Leo I. Bluestein - Rancho Bernardo CA Paul E. Crandell - San Diego CA David A. Drake - Escondido CA Leo Jedynak - San Diego CA Larry W. Simpson - Poway CA
Assignee:
Oak Industries Inc. - Rancho Bernardo CA
International Classification:
H04K 102
US Classification:
178 2208
Abstract:
A system for enciphering information bearing RF signals in digital form utilizes a first key common to all receivers. There are means to change the first key which means include, at the transmitter, means to send individual messages to each receiver, each message being itself enciphered in a second key which is peculiar to only one receiver or small group of receivers and which message includes a change of the first enciphering key. At each receiver there are means responsive to the correct address in a key change message which will thereafter permit the deciphering of the key change message in the key peculiar to the particular receiver or small group of receivers. The new first key is then used at the receiver to decipher subsequent information bearing messages.
Multi-Layer Encryption System For The Broadcast Of Encrypted Information
Anthony J. Wechselberger - San Diego CA Leo I. Bluestein - Rancho Bernardo CA Leo Jedynak - San Diego CA David A. Drake - Escondido CA Larry W. Simpson - Poway CA
Assignee:
Oak Industries Inc. - Rancho Bernardo CA
International Classification:
H04K 102
US Classification:
178 2208
Abstract:
A method of controlling the simultaneous broadcast of enciphered digital information signals, for example in a radio or television broadcast environment, to a plurality of subscribers provides several levels of enciphering keys. The broadcast digital information signal is in a broadcast common service enciphering key and communication between the transmitter and subscribers may take place in a box key or in a group enciphering key common to a group of subscribers having a common interest in the reception of broadcast signals of a particular type. Each receiver will decipher the broadcast digital information in a specific service key which is common to that broadcast. The service key may be changed at one or more subscribers by communicating the change in the service key to the subscribers by means of the group enciphering key. Further, the group enciphering key may be changed at one or more subscribers or new groups may be formed among subscribers by communicating to the subscribers in one or more group enciphering keys.