H - Electricity – 04 – K
Patent
H - Electricity
04
K
350/20, 340/70
H04K 1/00 (2006.01) H04N 7/167 (2006.01)
Patent
CA 1219930
ABSTRACT A system of transmitting an information individually and secretly is disclosed. The informa- tion to be transmitted is converted, on the transmisssion side, in accordance with a predetermined algorithm designated by two keys and then transmitted to a receiv- ing side. The receiving side is supplied with at least two keys from the transmitting side for reproducing a transmitted information by using the two keys. One of the keys is frequently changed so that the algorithm is also changed frequently. Accordingly, even if non- contracted receiver gets hardware for converting the information it cannot receive the transmitted information.
459360
Kabushiki Kaisha Toshiba
Marks & Clerk
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