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Private key generation apparatus and method, and storage media storing programs for executing the methods

  • US 9,036,818 B2
  • Filed: 05/31/2013
  • Issued: 05/19/2015
  • Est. Priority Date: 05/31/2012
  • Status: Active Grant
First Claim
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1. A private key generation apparatus, comprising:

  • a root private key generation unit configured to set a root master key and predetermined parameters capable of generating private keys, and to generate a first sub-master key set capable of generating a number of private keys equal to or smaller than a preset limited number; and

    a sub-private key generation unit configured to share authority to generate private keys with the root private key generation unit by receiving the first sub-master key set from the root private key generation unit, to generate a private key corresponding to a user ID using the first sub-master key set, and to issue the private key to a user;

    wherein the root private key generation unit receives a sub-private key generation unit ID and information about the number of service users from the sub-private key generation unit, authenticates the sub-private key generation unit ID, and transmits the first sub-master key set to the sub-private key generation unit if the authentication is successful,wherein at least one of the root private key generation unit and the sub-private key generation unit is implemented as a hardware component.

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