Data transmission apparatus and data reception apparatus
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United States of America Patent
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N/A
Issued Date -
Dec 14, 2006
app pub date -
Jun 7, 2006
filing date -
Jun 10, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
There provided are transmission and reception apparatuses which can realize performing key distribution and encrypted communication in a simultaneous manner. A transmission apparatus overlaps minute amplitude modulation based on a random number signal on a multi-level signal generated based on information data and key information. A reception apparatus, in addition to data identification, performs, by using 2 threshold values between which a sufficiently larger interval than a modulation amplitude by a random number is provided, 3 kinds of identification for the random number signal: '1', '0', and 'identification impossible', sends back information of bits with which the identification has succeeded, and shares the sent bits as a new key. Thus, the common device including the transmission and reception apparatuses can realize performing the key distribution and the encrypted communication in the simultaneous manner.
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