3-dimensional shape data encryption and decryption
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United States of America Patent
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Jan 13, 2004
Grant Date -
N/A
app pub date -
Jun 8, 1999
filing date -
Jun 9, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
Encryption and decryption methods for 3-dimensional shape data, especially copyrighted data, useful for detecting unauthorized use or piracy of a 3-dimensional object's shape represented by the 3-dimensional shape data are provided. An alteration is added to 3-dimensional shape data representing a 3-dimensional object by using an encryption key. The encrypted data, having been altered, are distributed. The 3-dimensional object represented by the encrypted data is distorted and different from the original 3-dimensional object. The recipient of the encrypted data can obtain the original 3-dimensional shape data by reversing the alteration of the encrypted data by using a decryption key.
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