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    • 5. 发明公开
    • DEVICES AND METHODS FOR THE DETECTION AND LOCALIZATION OF FAULT INJECTION ATTACKS
    • EP3672140A1
    • 2020-06-24
    • EP18306753.7
    • 2018-12-20
    • Secure-IC SAS
    • DAFALI, Rachid
    • H04L9/00
    • A device for detecting perturbation attacks performed on a digital circuit (1). The device comprises:
      - a first metallic layer (11) and a second metallic layer (13) arranged on the digital circuit (1), the first metal layer (11) comprising a plurality of signal transmission lines routed horizontally, the second metal layer (13) comprising a plurality of signal transmission lines routed vertically, the device comprising one or more transmitter buffers and one or more receiver buffers, a transmitter buffer and a receiver buffer being connected by each signal transmission line;
      - a random number generator (15) configured to generate random signal values;
      the device further comprising a transmitter manager (17) connected to one or more transmitter buffers and a receiver manager (19) connected to one or more receiver buffers,
      wherein:
      - the transmitter manager (17) is configured to transmit random signal values generated by the random number generator (15) over the signal transmission lines of the first metallic layer (11) and the second metallic layer (13),
      - the receiver manager (19) is configured to receive random signal values from the transmitter manager (17) through the one or more receiver buffers connected to the receiver manager (19), measure a transmission time corresponding to a time of transmission of the received random signal values, and compare the transmission time to a predefined timing interval to detect perturbation attacks.
    • 8. 发明公开
    • MULTI-MASTER SECURITY CIRCUIT
    • EP3572962A1
    • 2019-11-27
    • EP18305643.1
    • 2018-05-25
    • Secure-IC SAS
    • DAFALI, RachidDAVID, FreddyLE ROLLAND, MichelLORVELLEC, Karine
    • G06F21/60G06F21/71G06F21/72G06F12/14
    • There is provided a System on Chip comprising at least two hardware masters, a security circuit, and a communication infrastructure for communication between the hardware masters and the security circuit, the communication infrastructure being based on a given interface communication protocol. Each hardware master is configured to send a request to the security circuit for execution of the request by the security circuit through the communication infrastructure, each request comprising at least one service identifier identifying a service. The security circuit may comprise a Secure Mailbox comprising a filter configured to filter the requests received from the hardware masters, the filter being configured to determine at least one indicator bit, in response to the receipt of a request from a hardware master, using at least a part of an identifier associated with the master, the indicator bit indicating whether the master is allowed access to the Security circuit, the identifier being an hardware identifier received with the request through the communication protocol, the filter filtering the requests based on the bit indicators determined for each request. The security circuit is further configured to execute the filtered requests.
    • 10. 发明公开
    • SYSTEM AND METHOD FOR BOOLEAN MASKED ARITHMETIC ADDITION
    • EP3503460A1
    • 2019-06-26
    • EP17306928.7
    • 2017-12-22
    • Secure-IC SAS
    • GUILLEY, SylvainPORTEBOEUF, Thibault
    • H04L9/00
    • There is provided a device of executing a cryptographic operation on bit vectors, the execution of the cryptographic operation comprising the execution of at least one arithmetic addition operation between a first operand and a second operand. Each operand comprises a set of components, each component corresponding to a given bit position of the operand. The device comprises a set of elementary adders (10), each elementary adder being associated with a given bit position of the operands and being configured to perform a bitwise addition between a component of the first operand at the given bit position and the corresponding component of the second operand at the given bit position using the carry generated by the computation performed by the elementary adder corresponding to the previous bit position. Each elementary adder has a sum output corresponding to the bitwise addition and a carry ouput, the result of the arithmetic addition operation being derived from the sum ouputs provided by each elementary adder. The device is configured to apply a mask to each operand component input of at least some of the elementary adders using a masking logical operation, the mask being a random number.