| CPC G06F 21/6209 (2013.01) [G06F 16/00 (2019.01); G06F 21/30 (2013.01); G06F 21/60 (2013.01); G06F 21/602 (2013.01); G09C 1/00 (2013.01); H04L 9/0861 (2013.01); H04L 9/0891 (2013.01); H04L 9/16 (2013.01); H04L 63/04 (2013.01); H04W 12/02 (2013.01); G06F 21/1066 (2023.08); G06F 2221/2143 (2013.01)] | 15 Claims |
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1. A data masking method comprising:
converting a part including a secret target information of all or part of first data including the secret target information into a second data for reading or viewing;
performing masking processing on the second data, thereby generating a masking data;
storing the masking data in a storage unit; and
outputting the masking data stored in the storage unit, wherein
the masking processing includes:
first masking processing performed on a secret target region including the secret target information in the second data; and
second masking processing performed on the secret target region and a region other than the secret target region in the second data,
the masking processing includes a temporary canceling function that the masking data returns to a masking state after temporarily decrypting the masking data to obtain decrypted data and forcibly erase only the decrypted data at almost the same time as or immediately after presentation for reading or viewing, and
the masking processing generates third data obtained by cancellation of the second masking processing and decryption and performs the first masking processing on the third data.
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