Encrypted text verification system, method, and recording medium
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United States of America Patent
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Nov 19, 2019
Grant Date -
Nov 9, 2017
app pub date -
Oct 26, 2015
filing date -
Nov 5, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
In a data registration phase, encrypted data is calculated by encrypting input data to be concealed by using a secret key, registration data is generated based on the encrypted data and a verification key, and the registration data is stored as a registration template in a storage unit together with an identifier for uniquely identifying the registration data. In an encrypted text verification phase, a data verifying request is generated in which input data to be verified has been encrypted by using a random number, the registration template stored in the storage unit and the data verifying request are verified to produce a determined result, a verified result including a part or all of the registration template corresponding to the determined result is produced, and data is restored based on the verified result to produce a restored result.
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