# US 9,750,435 B2 · System, terminal, and method for digital electrocardiogram authentication

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- Number: US 9,750,435 B2
- Document ID: US9750435B2
- Status: Granted
- Kind: B2
- Application number: 15/178,415
- Filed: 2016-06-09
- Published: 2016-12-15
- Granted: 2017-09-05
- Earliest claimed: 2015-06-11
- Applicants: Moon-Seog Jun
- Inventors: Moon-Seog Jun
- Web page: https://patentgrep.com/patent/US9750435B2

## CPC

- A61B 5/117: Identification of persons (methods or arrangements for recognising patterns, e.g. fingerprints, G06F18/00, G06V40/00; identification of persons by analysing their voice or speech G10L17/00)
- A61B 5/282: Holders for multiple electrodes (for introduction into the body A61B5/287)
- A61B 5/346: Analysis of electrocardiograms
- A61B 5/35: by template matching
- A61B 5/352: Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
- A61B 5/681: {Wristwatch-type devices}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

Provided is an electrocardiogram (ECG) biometric authentication system that performs biometric authentication using biometric information having unique values for each client includes one or more client terminals and a key distribution center (KDC) that uses ECG information of the one or more client terminals to issue a digital certificate. According to the configuration of the electrocardiogram biometric authentication system, security is enhanced.

## Claims

### Claim 1

A method for a client terminal to be issued with a certificate from a key distribution center (KDC) using an electrocardiogram (ECG), the method comprising:
collecting, by the client terminal, analog ECG waveform information in which upward pulses and downward pulses are displayed as a continuous curve;
quantizing the analog ECG waveform information so that the analog ECG waveform information has discontinuous and unique ECG information values;
binarizing the ECG information values which has become unique by the quantization to generate a binary code;
changing the binary code into a private key and encrypting the private key and a public key;
transmitting, by the client terminal, the encrypted private and public keys to a key distribution center (KDC);
decrypting the encrypted public key, in the KDC, to generate the public key by using a Rivest-Shamir-Adleman (RSA)/Elliptic Curve Cryptosystem (ECC) algorithm;
transmitting the public key to the client terminal from the KDC; and
executing authentication, by the client terminal, using the public key.

### Claim 2 (depends on 1)

The method of claim 1, wherein, in decrypting the encrypted public key to generate the public key, the KDC uses the RSA/ECC algorithm to issue an ECG biometric private key verification and the certificate.