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Information processing apparatus and method

  • US 8,595,500 B2
  • Filed: 07/23/2010
  • Issued: 11/26/2013
  • Est. Priority Date: 07/06/2000
  • Status: Expired due to Term
First Claim
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1. An information processing apparatus, comprising:

  • a random value transmitting unit that transmits a random value to another information processing apparatus that receives encrypted content;

    a signature judging unit that judges whether a signature is valid, the signature being generated by the another information processing apparatus based on the random value and then transmitted from the another information processing apparatus;

    a key transmitting unit that transmits key information used for decrypting the encrypted content to the another processing apparatus in response to the signature being valid;

    a determining unit that determines an additional value used to update a count of information processing apparatuses that receive the key information based on whether identification information of the another information processing apparatus is registered in a registration list that includes respective identification information of each one of the information processing apparatuses that receive the key information; and

    an updating unit that updates the count by adding to it the additional value.

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