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Computer-Access-Code MatricesAuthorized users respond to changing challenges with changing passwords. Scheme for controlling access to computers defeats eavesdroppers and "hackers". Based on password system of challenge and password or sign, challenge, and countersign correlated with random alphanumeric codes in matrices of two or more dimensions. Codes stored on floppy disk or plug-in card and changed frequently. For even higher security, matrices of four or more dimensions used, just as cubes compounded into hypercubes in concurrent processing.
Document ID
19900000193
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Collins, Earl R., Jr.
(Caltech)
Date Acquired
August 14, 2013
Publication Date
April 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 4
ISSN: 0145-319X
Subject Category
Mathematics And Information Sciences
Report/Patent Number
NPO-17525
Accession Number
90B10193
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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