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Data processing apparatus for digital copyrights management

  • US 7,549,172 B2
  • Filed: 09/20/2004
  • Issued: 06/16/2009
  • Est. Priority Date: 02/25/2004
  • Status: Expired due to Fees
First Claim
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1. A data processing apparatus for distributing to a user terminal a terminal module that is a program for obtaining license data used for decoding an encrypted digital content, using a public key infrastructure, the data processing apparatus comprising:

  • a storage device to store an encryption key;

    a generation device to encrypt, using the encryption key, a public key certificate for encryption communications based on the public key infrastructure and information about a private key corresponding to the public key of the public key certificate, and to generate encryption information; and

    a transmission device to transmit to the user terminal the encryption information and a terminal module which includes a decoding key for decoding the encryption information.

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