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Method and apparatus for detecting a manipulation of a portable device

  • US 10,175,777 B2
  • Filed: 12/23/2014
  • Issued: 01/08/2019
  • Est. Priority Date: 12/31/2013
  • Status: Active Grant
First Claim
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1. A method for detecting a manipulation of a mobile device, comprising the following steps:

  • determining, by means of a sensor fixed to said mobile device, an orientation of a vertical direction in a reference frame tied to said mobile device at a plurality of successive instants;

    calculating, for each instant, an angle formed by the orientation of said vertical direction in said reference frame at each instant and a reference orientation corresponding to the vertical direction at a prior instant, wherein said reference orientation is chosen so as to be equal to the orientation of said vertical direction at a prior instant that precedes each instant by a duration τ

    of between 0.5 and 5 seconds; and

    detecting a manipulation when said angle exceeds a first threshold.

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