• Patent Title: Digital true random number generator based on S-boxes
  • Application No.: US14741964
    Application Date: 2015-06-17
  • Publication No.: US09891888B2
    Publication Date: 2018-02-13
  • Inventor: Sebastien Riou
  • Applicant: NXP B.V.
  • Applicant Address: NL Eindhoven
  • Assignee: NXP B.V.
  • Current Assignee: NXP B.V.
  • Current Assignee Address: NL Eindhoven
  • Agent Rajeev Madnawat
  • Main IPC: G06F7/58
  • IPC: G06F7/58 H04L9/00
Digital true random number generator based on S-boxes
Abstract:
Various embodiments relate to a device including a digital component configured to output a plurality of parallel bits based on an input wherein the digital component is capable of occupying a metastable state between a time the input is changed and a time the output plurality of parallel bits changes based on the changed input, wherein the digital component outputs metastable bits while occupying the metastable state; and a synchronous sampling circuit configured to sample bits from the digital component in synchronization with a received clock signal pulse, wherein when the clock signal pulse occurs while the digital component occupies a metastable state, the synchronous sampling circuit samples metastable bits, and wherein the input into the digital component changes in a manner that is asynchronous with respect to the clock signal pulse. In various embodiments, the digital component is a substitution box (S-box).
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