| 摘要 |
<p>A data encryption method capable of significantly reducing the danger of robbery of common key data when performing encryption transmission of digital information data which is encrypted and decrypted by using the common key data. An HD-SDI signal DHS is subjected to encryption corresponding to encryption/decryption common key data DEY so as to create an encrypted HD-SDI signal DHS. The encryption/decryption common key data DEY is subjected to encryption using public key data DOY so as to create encrypted encryption/decryption common key data DXY. The encrypted HD-SDI signal DHSE and the encrypted encryption/decryption common key data DXY are transmitted.</p> |
