Smart disk software protection system

Details Smart disk software protection system Smart disk software protection system

1994-11-14

1996-12-31

Tarcza, Thomas H.

Cryptography

Cryptanalysis

360 60, H04L 900

Patent

active

055901921

ABSTRACT:
A floppy disk, having a microprocessor and battery power supply, a magnetic field sensor, and an on switch on the central hub. A plurality of magnetic fields are placed on the disk housing, in a circular pattern around the disk's axis of rotation, and are detected using a magnetic field sensor located on the hub. When the floppy disk is placed into the computer's drive bay, the computer disk drive motor does an initial series of operating and idle time increments. The floppy disk magnetic field sensor detects the number of revolutions of the disk, and stores the revolutions per time increment. The computer then communicates with the floppy disk, using disk motor operation and idle times. The floppy disk communicates information to the computer, via the user who reads information on a LCD readout, located on the floppy disk, and types in the information on the computer keyboard. The floppy disk is used as a personalized key, for both installing and updating programs for continued use.

REFERENCES:
patent: 4672182 (1987-06-01), Hirokawa
patent: 5267311 (1993-11-01), Bakhoum
patent: 5341421 (1994-08-01), Ugon

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