| http://www.w3.org/ns/prov#value | - In the process, a multi-purpose reader can be used as the reading means 5120 in the case where the data is a bar code or a two-dimensional code. [0042] Then, the decryption key 5230 is read by the decryption means 15130 of the decryption key input unit 3130, and the encrypted data 5220 is decrypted by the decryption key.
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