×

Data output apparatus

  • US 7,757,092 B2
  • Filed: 11/09/2004
  • Issued: 07/13/2010
  • Est. Priority Date: 11/12/2003
  • Status: Expired due to Fees
First Claim
Patent Images

1. A data output apparatus comprising:

  • a controller capable of performing operations of;

    receiving data to be output;

    storing the received data to be output in a data storing means;

    outputting the received data to be output from the data storing means;

    encrypting the received data to be output;

    storing the encrypted data in the data storing means;

    generating a decryption key for decrypting the encrypted data;

    storing the generated decryption key in decryption key storing means;

    transmitting the decryption key to an identification card which is carried by a manager of the data output apparatus and in which identification information identifying the manager is stored, and storing the decryption key in the identification card;

    determining whether or not the identification information transmitted from the identification card is received;

    decrypting the encrypted data using the decryption key stored in the decryption key storing means and permitting output processing based on the decrypted data, until a predetermined time has elasped since it was determined that the identification information was received;

    deleting the decryption key stored in the decryption key storing means when the predetermined time has elapsed;

    determining whether or not the decryption key transmitted with the identification information is received from the identification card after the decryption key is deleted;

    storing the decryption key received from the identification card in the decryption key storing means;

    decrypting the encrypted data using the decryption key stored in the decryption key storing means and permitting output processing based on the decrypted data, until a predetermined time has elapsed since the decryption key was stored; and

    deleting the decryption key received from the identification card when the predetermined time has elapsed.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×