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    Circuit that includes a physically unclonable function
    1.
    发明授权
    Circuit that includes a physically unclonable function 有权

    公开(公告)号：US10256983B1

    公开(公告)日：2019-04-09

    申请号：US15077488

    申请日：2016-03-22

    申请人： National Technology & Engineering Solutions of Sandia, LLC

    发明人： Todd Bauer ,  Jason Hamlet ,  Ryan Michael Birmingham ,  Lyndon G. Pierson

    IPC分类号： H04L9/00 ,  H04L9/32 ,  H04L9/08

    摘要： Described herein are various technologies pertaining to authentication of integrated circuits by using external factors to affect or modify an output of a physically unclonable function (PUF) circuit. In an example, the output of the PUF circuit in response to a challenge signal can be sensitive to changes in environmental factors. In another example, the output of the PUF circuit can be sensitive to user-selectable configuration parameters of the PUF circuit. In yet another example, the output of the PUF circuit can be modified by additional circuitry external to the PUF circuit based upon one or more selectable or configurable inputs. A PUF-based device authentication system that uses external factors as authentication inputs to affect a challenge response of the device authentication system can enhance authentication capabilities by permitting multi-factor authentication.

    Integrated circuit physically unclonable function
    4.
    发明授权
    Integrated circuit physically unclonable function 有权

    公开(公告)号：US10103733B1

    公开(公告)日：2018-10-16

    申请号：US15817870

    申请日：2017-11-20

    申请人： National Technology & Engineering Solutions of Sandia, LLC

    发明人： Thomas M. Gurrieri ,  Jason R. Hamlet ,  Todd M. Bauer ,  Ryan Helinski ,  Lyndon G. Pierson

    IPC分类号： H03K19/003 ,  H03K19/177

    摘要： An integrated circuit (IC) based physically unclonable function (PUF) that comprises a common source amplifier for generating PUF output voltages, a unity gain, negative feedback operational amplifier for generating bias voltages, a voltage regulator and a bit exclusion circuit that excludes unstable PUF bits. Compensation circuitry built into the IC-PUF provides a high power supply rejection ratio and enables highly reliable operation of the IC-PUF across varying input voltages and operating temperatures. The IC-PUF generates a uniformly random output bit stream by taking advantage of process variations that are inherent to the fabrication of (metal-oxide semiconductor) MOS transistors.

    Repeatable masking of sensitive data
    5.
    发明授权
    Repeatable masking of sensitive data 有权

    公开(公告)号：US10177922B1

    公开(公告)日：2019-01-08

    申请号：US15077594

    申请日：2016-03-22

    申请人： National Technology & Engineering Solutions of Sandia, LLC

    发明人： Jason Hamlet ,  Ryan Helinski ,  Todd Bauer ,  Lyndon G. Pierson

    IPC分类号： H04L9/00 ,  G06F21/14 ,  H04L9/32 ,  G06F21/57

    摘要： The various technologies presented herein relate to enabling a value generated based upon a physical unclonable function (PUF) response to be available as needed, while also preventing exposure of the PUF to a malicious entity. A masked PUF response can be generated based upon applying a function to a combination of the PUF response and a data file (e.g., a bitstream), and the masked PUF response is forwarded to a requesting entity, rather than the PUF response. Hence, the PUF is masked from any entity requiring access to the PUF. The PUF can be located in a FPGA, wherein the data file is a bitstream pertinent to one or more configurable logic blocks included in the FPGA. A first masked PUF response generated with a first data file can have a different value to a second masked PUF response generated with a second data file.