4. Excavating

Toshio Tokita

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Block cipher apparatus using auxiliary transformation

Cryptography – Particular algorithmic function encoding
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Block encryption device using auxiliary conversion

Cryptography – Particular algorithmic function encoding
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Cipher processor, IC card and cipher processing method

Cryptography – Communication system using cryptography – Time segment interchange
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Data transformation apparatus and data transformation method

Cryptography – Communication system using cryptography – Time segment interchange
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Data transformation apparatus and data transformation method

Electrical computers and digital processing systems: support – Data processing protection using cryptography
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