Patent
1995-06-07
1997-12-16
Nguyen, Hoa T.
39518501, G06F 1100
Patent
active
056995091
ABSTRACT:
Errors in data stored in the memory of a computer are detected prior to use of the data. A protected data type is declared in writing a program in which errors in critical data must be detected before the data are used. The invention is preferably implemented on a personal computer system (10) or in a microcontroller for a device. When a protected data item is initialized, both the protected data item and its corresponding bit-inverted form are stored in memory. A constructor function is used to determine the bit-inverted form. Any time that the protected data item is subsequently accessed for use by an application program, either the stored protected data item or its corresponding bit-inverted form are inverted for comparison to the other stored data item. Any difference detected in this comparison indicates that a change has occurred in either or both of the protected data item and its corresponding bit-inverted form within memory. Depending upon the application program in which the invention is used, an appropriate action is taken upon detecting such an error, such as providing an indication of the error and terminating further execution of the program.
REFERENCES:
patent: 4656631 (1987-04-01), Nowak
patent: 4782487 (1988-11-01), Smelser
patent: 5361351 (1994-11-01), Lenkove et al.
patent: 5390325 (1995-02-01), Miller
patent: 5488727 (1996-01-01), Agrawal et al.
patent: 5513315 (1996-04-01), Tierney et al.
Stroustrup, B., "C.sup.++ Programming Language," Edition 2, US, New York, Addison Wesley, 1991, 669 blz.; EN, 1992; B. K3B300, S.25, Access Nr: B 0187120; pp. 229-236.
IBM Technical Disclosure Bulletin Jun. 1984, US, "Dual Storage System," Source (C) IBM Corp 1993, An: NA8406360; vol. 27, Nr. 1A, p. 360.
Chang Tao
Gary Scott P.
Pope David E.
Abbott Laboratories
Anderson Ronald M.
Marcus Neal D.
Nguyen Hoa T.
LandOfFree
Method and system for using inverted data to detect corrupt data does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for using inverted data to detect corrupt data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for using inverted data to detect corrupt data will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-216160