| 摘要 |
<p>The present invention relates to a transmission apparatus, a reception apparatus, a transmission method and a reception method, which are used for transmission and reception of encrypted digital data protected against illegal decryption of the encrypted digital data by a third party capable of inferring an encryption algorithm by decryption of a pattern having a known pre-encryption value, and relates to a recording medium for recording the encrypted digital data. <IMAGE></p> |
