Key transformation unit for an IC card

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6385723
SERIAL NO

09075974

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A multi-application IC card system and method is disclosed providing a secure data transmission technique. The method is used, for example, to load an application from an application provider, which could be remote, to an IC card. At least a portion of the application is encrypted using a transfer key. The transfer key is then encrypted using the public key of a public/secret key pair of the intended IC card to form a key transformation unit. The encrypted application and key transformation unit are then sent to the IC card and the IC card decrypts the key transformation unit using its secret key. The transfer key is then recovered and used to decrypt the encrypted application. The application can then by stored on the IC card and accessed by the card user.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
BAMBOO HOLDINGS, A CAYMAN ISLANDS EXEMPTED LIMITED COMPANYLONDON8
MULTOS LIMITEDLONDON20
STEPNEXUS HOLDINGS, A CAYMAN ISLAND EXEMPTED LIMITED COMPANYLONDON8

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Richards, Timothy Philip Herts, GB 21 649

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
ACTIVIDENTITY (2)
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Other [Check patent profile for assignment information] (4)
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* Cited By Examiner