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Computer access security code system

  • US 4,926,481 A
  • Filed: 12/05/1988
  • Issued: 05/15/1990
  • Est. Priority Date: 12/05/1988
  • Status: Expired due to Fees
First Claim
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1. In a security access control system wherein a user at a remote station requires approval from a controlling computer to gain access, the improvement comprising:

  • (a) a pair of matching first matrices of passwords located at the controlling computer and the remote station, respectively, each said first matrix of passwords comprising a plurality of individually unique symbols arranged in rows and columns to define a first virtual plane; and

    ,(b) access logic means located at the controlling computer and operably connected to read from and write to its associated said first matrix of passwords,(b1) for transmitting a first pair of said passwords from its said first matrix to the remote station when the remote station attempts to gain access, said first pair of said passwords being chosen from different said columns and rows whereby they define diagonally opposite corners of a rectangle in said first virtual plane,(b2) for receiving a first pair of said passwords transmitted from the remote station as obtained from the remote station'"'"'s said first matrix,(b3) for comparing said first pair of passwords transmitted from the remote station to the said passwords located in the controlling computer'"'"'s said first matrix at corners of said rectangle other than those defined by said transmitted first pair of said passwords,(b4) for granting access if said compared passwords are a match, and(b5) for denying access if said compared passwords are not a match.

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