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We have developed the teleradiology network system with a new information security solution that provided with web
medical image conference system. In the teleradiology network system, the security of information network is very
important subjects. We are studying the secret sharing scheme and the tokenization as a method safely to store or to
transmit the confidential medical information used with the teleradiology network system. The confidential medical
information is exposed to the risk of the damage and intercept. Secret sharing scheme is a method of dividing the
confidential medical information into two or more tallies. Individual medical information cannot be decoded by using
one tally at all. Our method has the function of automatic backup. With automatic backup technology, if there is a failure
in a single tally, there is redundant data already copied to other tally. Confidential information is preserved at an
individual Data Center connected through internet because individual medical information cannot be decoded by using
one tally at all. Therefore, even if one of the Data Centers is struck and information is damaged due to the large area
disaster like the great earthquake of Japan, the confidential medical information can be decoded by using the tallies
preserved at the data center to which it escapes damage. Moreover, by using tokenization, the history information of
dividing the confidential medical information into two or more tallies is prevented from lying scattered by replacing the
history information with another character string (Make it to powerlessness). As a result, information is available only to
those who have rightful access it and the sender of a message and the message itself are verified at the receiving point.
We propose a new information transmission method and a new information storage method with a new information
security solution.
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