Patent ID: 8924736
Filing Date: 2014-12-30
Classification: G06F,G06K

Abstract:
1. A method of authenticating or declining to authenticate an asserted identity of a candidate person (c-p), the method comprising: (i) initializing a count index c (c(initial)=0); (ii) providing or receiving a sequence of N reference heart electrical action cycles, numbered n=1, . . . , N, of a known reference person, and forming a graph v(t;n) representing each provided heart cycle for the reference person; (iii) randomly choosing K heart cycle graphs, numbered k=1, 2, . . . , K (3≦K≦N) of the provided reference heart cycles, comparing each chosen heart cycle graph v(t;k) with each of the other chosen heart cycle graphs, and identifying a pair of graphs, v(t;k1) and v(t;k2), for which ρ1(k1;k2) is a maximum value, where ρ1 is a first numerical-valued, graph comparison metric that compares two heart cycle graphs, v(t;k′) and v(t;k″), and provides a first numerical metric value ρ1(k′;k″) that is a measure of how closely the two graphs resemble each other; (iv) forming a composite heart cycle graph, denoted v(t;k12), using graph values associated with the graphs v(t;k1) and v(t;k2); (v) determining when at least a first selected fraction f1 (0.5≦f1<1) of the N heart cycle graphs resemble the composite graph, according to a first condition ρ1(k12;n)−(thr1)=D1, with D1 being always non-negative or always non-positive, where (thr1) is a selected first metric threshold value; (vi) when at least the selected fraction f1 of the N heart cycle graphs resemble each other according to the first condition, creating or providing a reference heart cycle graph v(t;ref)=v(t;k12); for the reference person; (vii) when at least the fraction f1 of the N heart cycle graphs do not resemble each other, incrementing the count index (c→c+1) to provide an incremented count index; (viii) when the incremented count index c is not greater than a selected maximum index value c(max), returning to step (iii) and repeating steps (iii)-(viii) at least once; and (ix) when the incremented count index satisfies c>c(max), interpreting this condition as indicating that it is not possible to create a reference heart cycle graph for the reference person.