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Control of database access using security/user tag correspondence table

  • US 5,787,428 A
  • Filed: 08/21/1996
  • Issued: 07/28/1998
  • Est. Priority Date: 02/16/1994
  • Status: Expired due to Term
First Claim
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1. A method of controlling access by a user to a database which comprises a set of data divided into sub-sets of data, said method comprising the steps of:

  • assigning a single security tag to each sub-set of data in at least some of said sub-sets of data,assigning a user tag to an identifier for each user in a user table,assigning at least one security tag to each user tag in a security table,utilising the user table to obtain the user tag for the user,utilising the security table to obtain at least one security tag corresponding to the user tag, andpermitting the user to access any sub-set of data having said at least one security tag.

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