Electronic signature authentication system

An electronic signature authentication system, comprising:

• a fingerprint reader configured to read a fingerprint on a touchscreen and/or measure depth characteristics of the fingerprint by multispectral imaging;
• a controller;
• a processor connected to the controller;
• a transceiver;
• a memory storing program instructions;
• a database;
• a fingerprint matcher connected to the processor, wherein the fingerprint matcher has program instructions for extracting fingerprint minutiae and constructing a gallery pair table and a probe pair table of the fingerprint minutia minutiae;
• a secret module for generating a secret;
• a sharing module connected to the processor,
• wherein the sharing module has program instructions for splitting data into N shares and assigning a threshold number S of shares needed to retrieve the data, where N≥2S−1, where N and S are integers greater than 1, and where N is the number of minutiae pairs,
• wherein the sharing module has program instructions configured to run a secret sharing scheme algorithm, and
• wherein the secret sharing algorithm generates N shares by choosing a polynomial f(x) such that f(x)=a0+a1x+ . . . ak−1xs−1;
• setting a0 equal to the secret;
• evaluating N1=f(1), . . . , Ni=f(i), . . . , Nn=f(n), for i=1, . . . , n is an integer, wherein the set of {N1, N2, . . . , Nn} are the N generated shares and s represents the number of shares needed to retrieve the secret and a1-ak−1 are randomly selected coefficients;
• wherein the controller has circuitry configured to
• receive a subscriber request to record a fingerprint,
• cause the fingerprint reader to record fingerprint data,
• cause the secret module to generate the secret,
• instruct the processor to
• apply the fingerprint data to the fingerprint matcher,
• apply the fingerprint minutiae to the sharing module to generate N
• fingerprint minutiae shares and the threshold number S,
• apply the secret to the sharing module to generate N shares of the secret,
• combine the N shares of the fingerprint minutiae shares and the N shares of the secret to generate N combined shares;
• and
• wherein the controller further has circuitry configured to cause the transceiver to transmit each share of the N combined shares to a unique cloud storage location of a plurality of cloud storage locations.