US Patent No: 4,471,216

Number of patents in Portfolio can not be more than 2000

System and process for identification of persons requesting access to particular facilities

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The user has a credit card incorporating electronic devices and/or circuits. The facility which is to be protected has an electronic device and/or circuit analogous to that of the credit card. The devices of the credit card and of the facility contain in their respective memories a secret code S, an identification code I.sub.n, and a program p. The facility which is to be protected has available a generator of a random code E which is transmitted into each of the devices when a request for access is made. The devices within the card and the facility each calculate the function R=p(S, E, I.sub.n), and a comparator situated in the facility which is to be protected compares the functions supplied by each of the devices to allow or deny access of the person to the said facility.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
COMPAGNIE INTERNATIONALE POUR L'INFORMATIQUE CII-HONEYWELL BULL (SOCIETE ANONYME)PARIS140

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Herve, Robert J L Versailles, FR 1 142

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Atalla Technovations (3)
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4,268,715 Method and apparatus for securing data transmissions 61 1979
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Honeywell Information Systems Inc. (1)
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LENOVO (SINGAPORE) PTE LTD. (1)
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Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
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NCR CORPORATION (3)
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Other [Check patent profile for assignment information] (2)
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