Patents by Inventor Arnaldo Campinos

Arnaldo Campinos has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for controlling access to a domestic network and device implementing the process
    Patent number: 6532539
    Abstract: The present invention relates to a process making it possible to control access to at least one terminal with address AD by at least one scrambled item with the aid of at least one control word. The process comprises a step making it possible to construct a descrambling item in the form of a message containing the control word, a datum making it possible to identify the scrambled item and the address of the terminal.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: March 11, 2003
    Assignee: Thomson Licensing S.A.
    Inventors: Arnaldo Campinos, Dominique Guillet
  • Process for protecting an information item transmitted from a security element to a decoder and protection system using such a process
    Patent number: 6266415
    Abstract: The invention relates to a process for protecting an information item transmitted from a security element to a decoder and a protection system using such a process. The information item is protected by encrypting within the security element the information item to be transmitted to the decoder and by decrypting this information item within the decoder. The invention applies to conditional-access systems.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: July 24, 2001
    Assignee: Thomson multimedia S.A.
    Inventors: Arnaldo Campinos, Jean-Bernard Fischer
  • Conditional access system using messages with multiple encryption keys
    Patent number: 6091818
    Abstract: The invention relates to a conditional access system making it possible for a service provider to supply his services solely to users having acquired entitlements to these services.The services supplied by a service provider consist of an item scrambled by control words. To keep these control words secret, they are supplied in messages (MEC) after having been encrypted with an encryption algorithm with key K.According to the invention, one and the same message (MEC) contains the same control word (Cwi) encrypted several times, each encryption (E(Cwi)Kj) of the control word depending on a different encryption key (Kj).The invention applies to any type of conditional access system, be this system either of "off-line" or "on-line" type.
    Type: Grant
    Filed: July 28, 1997
    Date of Patent: July 18, 2000
    Assignee: Thomson multimedia, S.A.
    Inventors: Arnaldo Campinos, Jean-Bernard Fischer
  • Process for data certification by scrambling and certification system using such a process
    Patent number: 6035397
    Abstract: The invention relates to a process for data certification as well as to the system implementing the certification process.The certification of the data is performed by scrambling.An authority independent of the entity which controls the data source and of the user(s) for which these data are intended, scrambles the data with the aid of control words and encrypts the control words with the aid of an encryption algorithm with key K.So that a user or the users can descramble the data scrambled by the independent authority, a certification verification device containing the encryption key K is supplied to the user or users under the control of the independent authority.The certification process and the system associated therewith apply more particularly to conditional-access systems.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: March 7, 2000
    Assignee: Thomson Multimedia, S.A.
    Inventors: Arnaldo Campinos, Louis Gregoire, Jean-Marie Vigneron
  • Conditional access system and smartcard allowing such access
    Patent number: 6035038
    Abstract: The conditional access system of the present invention allows a service provider to supply services, which may be scrambled by a control word, only to those users who have acquired entitlements to these services. The control word is supplied in Entitlement Control Messages (ECM) after having been encrypted using a key. The entitlements of each user are forwarded in Entitlement Management Messages which contain the key. The conditional access system verifies and validates the ECM and EMM prior to processing the control word.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: March 7, 2000
    Assignee: Thomson multimedia S.A.
    Inventors: Arnaldo Campinos, Jean-Bernard Fischer