Patents by Inventor Marco Macchetti

Marco Macchetti 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).

  • Publication number: 20190280853
    Abstract: A method to protect a device key in a device comprising at least one secure element locally connected to at least one time programmable memory storing a global value in form of a bit string comprising locked bits and unlocked bits. The locked bits are irreversibly pre-programmed in the one-time-programmable memory during an initialization phase of the device while the un-locked bits remaining in an initial state may be programmable by the secure element. The secure element is configured to generate, at initialization of the device, a device specific value by using the global value, program the device specific value previously obtained in the one time programmable memory, and erase the global value by programming the unlocked bits of the corresponding bit string. A further object of the disclosure includes a device configured to carry out the method.
    Type: Application
    Filed: January 2, 2019
    Publication date: September 12, 2019
    Applicant: NAGRAVISION S.A.
    Inventors: Didier HUNACEK, Marco MACCHETTI, Nicolas FISCHER
  • Publication number: 20190187994
    Abstract: A method of monitoring execution in an execution environment of an operation, for example a cryptographic operation, comprising a sequence of instructions, is disclosed. Instructions sent in the sequence from a main processor to one or more auxiliary processors, for example cryptographic processors, to execute the operation are monitored and the sequence of instructions is verified using verification information. The method comprises enabling output from the execution environment of a result of the operation in response to a successful verification of the sequence, or generating a verification failure signal in response to a failed verification of the sequence.
    Type: Application
    Filed: August 2, 2017
    Publication date: June 20, 2019
    Inventors: Marco MACCHETTI, Nicolas FISCHER, Jerome PERRINE
  • Patent number: 10205588
    Abstract: A method to protect a device key in a device comprising at least one secure element locally connected to at least one time programmable memory storing a global value in form of a bit string comprising locked bits and unlocked bits. The locked bits are irreversibly pre-programmed in the one-time-programmable memory during an initialization phase of the device while the unlocked bits remaining in an initial state may be programmable by the secure element. The secure element is configured to generate, at initialization of the device, a device specific value by using the global value, program the device specific value previously obtained in the one time programmable memory, and erase the global value by programming the unlocked bits of the corresponding bit string. A further object of the disclosure includes a device configured to carry out the method.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: February 12, 2019
    Assignee: Nagravision S.A.
    Inventors: Didier Hunacek, Marco Macchetti, Nicolas Fischer
  • Publication number: 20190028518
    Abstract: System and method for establishing secure conference calls. In one example system, a central conference call server establishes point-to-point connections with accessory devices comprising a secure element and connected to corresponding participant devices. The conference call server includes an interface to a plurality of secure elements configured to perform scrambling and unscrambling of media signals communicated to and from the accessory devices. In another example, one of the participant devices operates as the central conference call server. In other examples, participant devices communicate on a conference call via point-to-point connections between all accessory devices connected to the participant devices. The accessory devices include secure elements for decryption and encryption of media signals communicated between the accessory devices.
    Type: Application
    Filed: September 13, 2018
    Publication date: January 24, 2019
    Inventors: Francois Fer, Marco Macchetti, Laurent Gauteron, Jerome Perrine
  • Patent number: 10122767
    Abstract: System and method for establish secure conference calls. In one example system, a central conference call server establishes point-to-point connections with accessory devices comprising a secure element and connected to corresponding participant devices. The conference call server includes an interface to a plurality of secure elements configured to perform scrambling and unscrambling of media signals communicated to and from the accessory devices. In another example, one of the participant devices operates as the central conference call server. In other examples, participant devices communicate on a conference call via point-to-point connections between all accessory devices connected to the participant devices. The accessory devices include secure elements for decryption and encryption of media signals communicated between the accessory devices.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: November 6, 2018
    Assignee: NAGRAVISION S.A.
    Inventors: Francois Fer, Marco Macchetti, Laurent Gauteron, Jerome Perrine
  • Patent number: 10075770
    Abstract: Method for securing control words within a decoder in charge of descrambling digital content protected by these control words, comprising the following steps: for each descrambling unit of this decoder, loading in a directory a pairing key referenced by an identifier associating said key to a descrambling unit; receiving at least one encrypted control word referenced by an indication allowing to identify the descrambling unit for which it is intended; decrypting the control word by using a first key shared with a security module; identifying in the directory the pairing key whose identifier corresponds to the indication of destination associated to the control word; encrypting this control word by using this pairing key; and storing in a register the control word in a chronological and referenced way.
    Type: Grant
    Filed: July 4, 2014
    Date of Patent: September 11, 2018
    Assignee: Nagravision S.A.
    Inventors: Marco Macchetti, Jerome Perrine, Patrick Servet, Didier Hunacek
  • Patent number: 10027482
    Abstract: A method and a cryptographic device for encrypting/decrypting an input message by using an algorithm having as entries, said input message, a cryptographic key, and a complementary unique value used as parameter of the algorithm. The output data is formed by the input message decrypted/encrypted by the algorithm using the cryptographic key and the complementary value. The latter is determined on the basis of a unique value physically bound to an electronic device by using a physically unclonable function (PUF) which is inherent to this device and which is used to generate this unique value from a plurality of physical measurements carried out on components integrated in said device.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: July 17, 2018
    Assignee: Nagravision S.A.
    Inventors: Marco Macchetti, Claudio Favi
  • Publication number: 20180123807
    Abstract: A method for generating a value inherent to an electronic circuit by measuring a physical quantity carried out on components of the electronic circuit, comprising calculating and associating to each component at least one value derived from a series of measurements carried out on said component, the calculating of the at least one value comprising: determining a statistical value from said series of measurements, defining said value derived from the series of measures as being said statistical value or an uncertainty range calculated from said statistical value, forming a collection of invariable pairs of components, selecting, in said collection, pairs so that said values associated to the components of each one of these pairs are spaced from each other by at least a setpoint value, generating said value inherent to the electronic circuit by concatenating the results of comparisons based on at least one of the values associated to the components of each selected pair, and data among which at least one is der
    Type: Application
    Filed: May 26, 2016
    Publication date: May 3, 2018
    Applicant: NAGRAVISION S.A.
    Inventors: Marco MACCHETTI, Roan HAUTIER, Claudio FAVI, Jerome PERRINE
  • Publication number: 20180034625
    Abstract: A method to protect a device key in a device comprising at least one secure element locally connected to at least one time programmable memory storing a global value in form of a bit string comprising locked bits and unlocked bits. The locked bits are irreversibly pre-programmed in the one-time-programmable memory during an initialization phase of the device while the unlocked bits remaining in an initial state may be programmable by the secure element. The secure element is configured to generate, at initialization of the device, a device specific value by using the global value, program the device specific value previously obtained in the one time programmable memory, and erase the global value by programming the unlocked bits of the corresponding bit string. A further object of the disclosure includes a device configured to carry out the method.
    Type: Application
    Filed: December 8, 2015
    Publication date: February 1, 2018
    Applicant: NAGRAVISION S.A.
    Inventors: Didier HUNACEK, Marco MACCHETTI, Nicolas FISCHER
  • Publication number: 20170269151
    Abstract: A method to control aging of a system on chip comprising one or more devices including semiconductor circuit components and at least one aging controller monitoring electrical signals circulating inside the system on chip. The method comprises steps of stressing at least one device of the system on chip by varying hardware parameters related to its operating mode, comparing at least one parameter associated with an electrical signal produced by the at least one device with a reference parameter to determine a difference corresponding to an operating age value of the at least one device, if the operating age value equals or exceeds a threshold age value, determining a stress state value and modifying the operating mode of the at least one device according to the stress state value. A system on chip performing the method is also disclosed.
    Type: Application
    Filed: August 18, 2015
    Publication date: September 21, 2017
    Applicant: NAGRAVISION S.A.
    Inventors: Claudio FAVI, Marco MACCHETTI, Karl OSEN
  • Patent number: 9729322
    Abstract: Method and system for personalizing a chip, intended to be integrated into a smart card, comprising a tester associated to an FPGA device connected to the chip, the chip being part of a wafer comprising a plurality of chips and a disposable hardware module for verifying presence of the chip on the wafer. The tester sends a first secret code to the FPGA device, which commands the chip to initiate a test mode activation. The FPGA device encrypts a second secret code by using a secret encryption algorithm parameterized with a random number received from the chip and the first secret code to obtain a first cryptogram which is sent to the chip. The chip determines a second cryptogram by carrying out a Boolean function over a result obtained by decryption of the first cryptogram using the inverse algorithm parameterized with the random number and the first secret code.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: August 8, 2017
    Assignee: NAGRAVISION S.A.
    Inventors: Roan Hautier, Marco Macchetti, Jerome Perrine
  • Patent number: 9571899
    Abstract: A method for watermarking digital media content received in a form of at least one encrypted sample to which metadata is assigned. Each sample is encrypted by means of a sample key. The metadata comprises first data, second data and a signature resulting from the first and second data. The first data is encrypted by a transport key and comprises at least a content key and watermarking metadata. The second data comprises an initialization vector so that the content key and the initialization vector form a unique pair of cryptographic data equivalent to the sample key. The method comprises the steps of extracting the metadata from the media content, decrypting the first data by using the transport key, authenticating the signed data and, in case of positive outcome, descrambling each sample by using the pair of cryptographic data, and marking each descrambled sample by using the watermarking metadata.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: February 14, 2017
    Assignee: NAGRAVISION S.A.
    Inventors: Didier Hunacek, Patrick Servet, Marco Macchetti
  • Patent number: 9563769
    Abstract: A system and method for securely loading data in a cache memory associated with at least one secure processor that performs data processing by using at least one untrusted external memory storing data to be processed, at least one secure internal cache memory to load or store data, and at least one secure cache translator operating as a memory management unit. The secure cache translator stores, into a secure cache digest table, parameters arranged on persistent and variable data pages. The parameters comprise at least a root digest based on node digests calculated on at least one persistent data page according to a Merkle tree structure. The integrity of the data pages is verified during transfers between the secure internal cache memory and the external memory by comparing a calculated root digest with the root digest stored in the secure cache digest table.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: February 7, 2017
    Assignee: NAGRAVISION S.A.
    Inventors: Didier Hunacek, Marco Macchetti, Patrick Servet
  • Publication number: 20160352708
    Abstract: System and method for establish secure conference calls. In one example system, a central conference call server establishes point-to-point connections with accessory devices comprising a secure element and connected to corresponding participant devices. The conference call server includes an interface to a plurality of secure elements configured to perform scrambling and unscrambling of media signals communicated to and from the accessory devices. In another example, one of the participant devices operates as the central conference call server. In other examples, participant devices communicate on a conference call via point-to-point connections between all accessory devices connected to the participant devices. The accessory devices include secure elements for decryption and encryption of media signals communicated between the accessory devices.
    Type: Application
    Filed: May 29, 2015
    Publication date: December 1, 2016
    Inventors: Francois Fer, Marco Macchetti, Laurent Gauteron, Jerome Perrine
  • Publication number: 20160241527
    Abstract: The present invention relates in particular to a pairing method between a multimedia unit and one operator having an operator identifier, the multimedia unit having a multimedia unit identifier and receiving conditional access data from said operator, the method being characterized in that: receiving by the multimedia unit a multimedia unit key formed by applying a first cryptographically function to a personalization key and to the multimedia unit identifier; receiving by the operator an operator key formed by applying a second cryptographically function to said personalization key and to the operator identifier; said multimedia unit further having a function of the multimedia unit and said operator further having a function of the operator, these functions being such that the result of the application of the function of the operator to said operator key and to said multimedia unit identifier is equal to the result of the application of the function of the multimedia unit to said multimedia unit key and
    Type: Application
    Filed: February 16, 2016
    Publication date: August 18, 2016
    Inventors: Nicolas FISCHER, Brecht WYSEUR, Jean-Bernard FISCHER, Marco MACCHETTI
  • Publication number: 20160226662
    Abstract: Method and system for personalizing a chip, intended to be integrated into a smart card, comprising a tester associated to an FPGA device connected to the chip, the chip being part of a wafer comprising a plurality of chips and a disposable hardware module for verifying presence of the chip on the wafer. The tester sends a first secret code to the FPGA device, which commands the chip to initiate a test mode activation. The FPGA device encrypts a second secret code by using a secret encryption algorithm parameterized with a random number received from the chip and the first secret code to obtain a first cryptogram which is sent to the chip. The chip determines a second cryptogram by carrying out a Boolean function over a result obtained by decryption of the first cryptogram using the inverse algorithm parameterized with the random number and the first secret code.
    Type: Application
    Filed: April 7, 2016
    Publication date: August 4, 2016
    Inventors: Roan HAUTIER, Marco MACCHETTI, Jerome PERRINE
  • Publication number: 20160173946
    Abstract: Method for securing control words within a decoder in charge of descrambling digital content protected by these control words, comprising the following steps: for each descrambling unit of this decoder, loading in a directory a pairing key referenced by an identifier associating said key to a descrambling unit; receiving at least one encrypted control word referenced by an indication allowing to identify the descrambling unit for which it is intended; decrypting the control word by using a first key shared with a security module; identifying in the directory the pairing key whose identifier corresponds to the indication of destination associated to the control word; encrypting this control word by using this pairing key; and storing in a register the control word in a chronological and referenced way.
    Type: Application
    Filed: July 4, 2014
    Publication date: June 16, 2016
    Applicant: Nagravision S.A.
    Inventors: Marco MACCHETTI, Jerome PERRINE, Patrick SERVET, Didier HUNACEK HUNACEK
  • Patent number: 9338004
    Abstract: Method and system for personalizing a chip, intended to be integrated into a smart card, comprising a tester associated to an FPGA device connected to the chip, the chip being part of a wafer comprising a plurality of chips and a disposable hardware module for verifying presence of the chip on the wafer. The tester sends a first secret code to the FPGA device, which commands the chip to initiate a test mode activation. The FPGA device encrypts a second secret code by using a secret encryption algorithm parameterized with a random number received from the chip and the first secret code to obtain a first cryptogram which is sent to the chip. The chip determines a second cryptogram by carrying out a Boolean function over a result obtained by decryption of the first cryptogram using the inverse algorithm parameterized with the random number and the first secret code.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: May 10, 2016
    Assignee: NAGRAVISION S.A.
    Inventors: Roan Hautier, Marco Macchetti, Jerome Perrine
  • Publication number: 20160088366
    Abstract: A method for watermarking digital media content received in a form of at least one encrypted sample to which metadata is assigned. Each sample is encrypted by means of a sample key. The metadata comprises first data, second data and a signature resulting from the first and second data. The first data is encrypted by a transport key and comprises at least a content key and watermarking metadata. The second data comprises an initialization vector so that the content key and the initialization vector form a unique pair of cryptographic data equivalent to the sample key. The method comprises the steps of extracting the metadata from the media content, decrypting the first data by using the transport key, authenticating the signed data and, in case of positive outcome, descrambling each sample by using the pair of cryptographic data, and marking each descrambled sample by using the watermarking metadata.
    Type: Application
    Filed: April 11, 2014
    Publication date: March 24, 2016
    Applicant: NAGRAVISION S.A.
    Inventors: Didier HUNACEK, Patrick SERVET, Marco MACCHETTI
  • Publication number: 20150363594
    Abstract: A system and method for securely loading data in a cache memory associated with at least one secure processor that performs data processing by using at least one untrusted external memory storing data to be processed, at least one secure internal cache memory to load or store data, and at least one secure cache translator operating as a memory management unit. The secure cache translator stores, into a secure cache digest table, parameters arranged on persistent and variable data pages. The parameters comprise at least a root digest based on node digests calculated on at least one persistent data page according to a Merkle tree structure. The integrity of the data pages is verified during transfers between the secure internal cache memory and the external memory by comparing a calculated root digest with the root digest stored in the secure cache digest table.
    Type: Application
    Filed: June 10, 2015
    Publication date: December 17, 2015
    Inventors: Didier HUNACEK, Marco MACCHETTI, Patrick SERVET