Method and apparatus for controlling access to confidential data by analyzing property inherent in data
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United States of America Patent
Stats
-
Aug 20, 2002
Grant Date -
Nov 22, 2001
app pub date -
Sep 25, 1998
filing date -
Sep 26, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for controlling access to confidential data are disclosed. The disclosed apparatus includes a non-volatile memory for storing data and a logic circuit for controlling access to the data contained in the memory. The logic circuit selectively accesses the memory to determine whether at least a portion of the data contained in the memory comprises confidential data by analyzing a property inherent in the accessed data. The disclosed method includes the steps of: defining a predetermined section of the programmable memory as a repository for confidential data; addressing the predetermined section of the programmable memory; calculating a number of data blocks in the predetermined section having a predetermined characteristic; comparing the calculated number to a threshold value; and defining the memory as including confidential data in the predetermined section if the calculated number has a predetermined relationship to the threshold value.
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