公开(公告)号：US20190026457A1

公开(公告)日：2019-01-24

申请号：US16067757

申请日：2017-01-11

Applicant: STC.UNM

Inventor： James PLUSQUELLIC ,  Wenjie CHE ,  Dylan ISMARI

IPC: G06F21/44 ,  G06F21/73 ,  H04L9/32 ,  H04L9/08 ,  H04L9/06

Abstract: An authentication protocol using a Hardware-Embedded Delay PUF (“HELP”), which derives randomness from within-die path delay variations that occur along the paths within a hardware implementation of a cryptographic primitive, for example, the Advanced Encryption Standard (“AES”) algorithm or Secure Hash Algorithm 3 (“SHA-3”). The digitized timing values which represent the path delays are stored in a database on a secure server (verifier) as an alternative to storing PUF response bitstrings thereby enabling the development of an efficient authentication protocol that provides both privacy and mutual authentication.

公开(公告)号：US20170364709A1

公开(公告)日：2017-12-21

申请号：US15534116

申请日：2015-12-15

Applicant: STC.UNM

Inventor： James PLUSQUELLIC

IPC: G06F21/73 ,  G06F21/60 ,  G06F21/71 ,  G06F21/70 ,  G06F17/18

CPC classification number: G06F21/73 ,  G06F17/18 ,  G06F21/604 ,  G06F21/70 ,  G06F21/71 ,  G09C1/00 ,  H04L9/3278

Abstract: A Hardware-Embedded Delay Physical Unclonable Function (“HELP PUF”) leverages entropy by monitoring path stability and measuring path delays from core logic macros. Reliability and security enhancing techniques for the HELP PUF reduce bit flip errors during regeneration of the bitstring across environmental variations and improve cryptographic strength along with the corresponding difficulty of carrying out model building attacks. A voltage-based enrollment process screens unstable paths on normally synthesized (glitchy) functional units and reduces bit flip errors by carrying out enrollment at multiple supply voltages controlled using on-chip voltage regulators.

公开(公告)号：US20190268170A1

公开(公告)日：2019-08-29

申请号：US16346772

申请日：2017-11-03

Applicant: STC.UNM

Inventor： James PLUSQUELLIC ,  Wenjie CHE

IPC: H04L9/32 ,  G06F21/44

Abstract: The Distribution Effect is proposed for the HELP PUF that is based on purposely introducing biases in the mean and range parameters of path delay distributions to enhance entropy. The biased distributions are then used in the bitstring construction process to introduce differences in the bit values associated with path delays that would normally remain fixed. Offsets are computed to fine tune a token's digitized path delays as a means of maximizing entropy and reproducibility in the generated bitstrings: a first population-based offset method computes median values using data from multiple tokens (i.e., the population) and a second chip-specific technique is proposed which fine tunes path delays using enrollment data from the authenticating token.

公开(公告)号：US20200313847A1

公开(公告)日：2020-10-01

申请号：US16759729

申请日：2018-10-30

Applicant: STC.UNM

Inventor： James PLUSQUELLIC

IPC: H04L9/00 ,  H04L9/16 ,  H04L9/06

Abstract: A side-channel attack countermeasure that leverages implementation diversity and dynamic partial reconfiguration as mechanisms to reduce correlation in the power traces measured during a differential power analysis (DPA) attack. The technique changes the underlying hardware implementation of any encryption algorithm using dynamic partial reconfiguration (DPR) to resist side-channel-based attacks.