| 摘要 |
<p>An encryption device capable of improving the encryption intensity when encrypting digital information data according to random number data or pseudo-random number data formed in accordance with key data and obtaining encrypted information data. The encryption device includes an encryption unit (40) for encrypting an HD signal to obtain an encrypted HD signal, an encryption forming unit (45) for forming encryption data supplied as pseudo-random number data or random number data to the encryption unit (40) according to the key data, a register unit (44) for forming a data supply unit for supplying input data to the encryption forming unit (45), and a line number data extraction unit (43) for supplying the line number data in the HD signal as initial value data to the register unit (44).</p> |
