| 摘要 |
The present invention makes it possible to verify definition information and data in a remote environment while properly protecting confidential data definition information using encryption and the like. The present invention comprises: a step for hiding in an individual manner definition information, such as a word or partial character string representing confidential information, using encryption, hashing, or the like; a step for extracting and hiding in an individual manner a word, partial character string or other such element from data to be controlled; a step for transmitting the hidden element to a server; and a step for verifying, in a hidden manner as-is, the hidden definition information and the hidden element, and deciding whether information matching the definition information is included in the data to be controlled. |
