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Network system for transporting security-protected data

  • US 6,480,963 B1
  • Filed: 01/04/1999
  • Issued: 11/12/2002
  • Est. Priority Date: 06/17/1998
  • Status: Expired due to Term
First Claim
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1. A network system in which a sender transmits data to a recipient over a network after applying appropriate security processes to the data, the system comprising:

  • a transmission unit comprising;

    at least one table containing information about data confidentiality levels of different kinds of data and about security processes required in each data confidentiality level, the data confidentiality levels being determined from data attribute information and communication environment, security processing means for determining the data confidentiality level of given data to be transmitted to the recipient and identifying which security processes to apply thereto, with reference to said at least one table, and applying the identified security processes to the data, identification data attaching means for attaching identification data to the data to allow the recipient to identify the security processes that said security processing means has applied, and transmission means for transmitting the data over the network to the recipient, together with the identification data being attached thereto; and

    a reception unit, coupled to said transmission unit via the network, comprising;

    reception means for receiving the data that is sent over the network by said transmission unit, identification data extracting means for extracting the identification data that is attached to the data, and unprotecting means for unprotecting the data by using the identification data extracted by said identification data extracting means.

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