# US 10,482,227 B2 · Electroencephalography (EEG) based authentication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,482,227 B2 - Document ID: US10482227B2 - Status: Granted - Kind: B2 - Application number: 15/472,072 - Filed: 2017-03-28 - Published: 2018-10-04 - Granted: 2019-11-19 - Earliest claimed: 2017-03-28 - Assignees: International Business Machines Corporation - Applicants: International Business Machines Corporation - Inventors: Hao Chen; Ya Bin Dang; Qi Cheng Li; Shao Chun Li; Jie Ma; Lijun Mei; Jian Wang; Yipeng Yu; Xin Zhou - Web page: https://patentgrep.com/patent/US10482227B2 ## CPC - G06F 21/32: using biometric data, e.g. fingerprints, iris scans or voiceprints - 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 5/378: Visual stimuli - G06F 3/015: {Input arrangements based on nervous system activity detection, e.g. brain waves [EEG] detection, electromyograms [EMG] detection, electrodermal response detection} - H04L 63/0861: {using biometrical features, e.g. fingerprint, retina-scan (cryptographic mechanisms or cryptographic arrangements for entity authentication using biological data H04L9/3231)} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An authentication method, system, and computer program product for decoding brain activity into a brain pattern sequence, applying brain dialog to interact with a user while the user is entering the brain pattern sequence, and matching the brain pattern sequence with a predetermined password to allow access to a system. ## Claims ### Claim 1 A computer-implemented authentication method, the method comprising: decoding brain activity into a brain pattern sequence as an entry for a password into a locked device; applying brain dialogue to interact with a user while the user is entering the brain pattern sequence; matching the brain pattern sequence with a predetermined password to allow access to a system; and embedding an alarm module which activates when the user is under a threat as determined by the brain pattern sequence matching a security password as the predetermined password, wherein a signal is sent to a third-party when the alarm module activates as a result of the threat, and wherein the decoding deducts the brain pattern sequence by analyzing a signal slope of a slope threshold of the brain activity to determine a timing and a duration of the brain activity. ### Claim 2 (depends on 1) The computer-implemented method of claim 1, wherein the brain activity is received via electroencephalography (EEG) of which is processed into a time domain feature, a frequency domain feature, a spatial domain feature, and a signal slope, wherein the brain activity is classified into user actions associated with the time domain feature, the frequency domain feature, the spatial domain feature, and the signal slope, and wherein the classified brain activity is matched with the predetermined password based on a threshold error compared to the time domain feature, the frequency domain feature, the spatial domain feature, and the signal slope of the brain activity. ### Claim 3 (depends on 1) The computer-implemented method of claim 1, wherein the brain dialogue comprises a sensory signal to the user that is invisible to other users. ### Claim 4 (depends on 1) The computer-implemented method of claim 1, wherein the brain pattern sequence comprises an element of a plurality of types of brain activity. ### Claim 5 (depends on 1) The computer-implemented method of claim 1, further comprising combining multi-mode brain activities to confirm the brain pattern sequence. ### Claim 6 (depends on 1) The computer-implemented method of claim 1, wherein the decoding the brain activity decodes the brain activity using at least one of motion imagery, P300, and Steady-State Visual Evoked Potentials (SSVEP). ### Claim 7 (depends on 1) The computer-implemented method of claim 1, wherein the brain pattern sequence comprises a multi-sequence brain pattern sequence of which a user will obtain authorization directly if a recognition accuracy of a first brain activity is greater than a predetermined threshold to proceed to a next sequence of the multi-sequence brain pattern sequence, and wherein a time domain feature, a frequency domain feature, a spatial domain feature, and a signal slope of each brain activity are distilled and combined. ### Claim 8 (depends on 1) The computer-implemented method of claim 1, wherein a signal slope is used to determine timing and a duration of brain patterns. ### Claim 9 (depends on 1) The computer-implemented method of claim 1, embodied in a cloud-computing environment. ### Claim 10 A computer program product for authentication, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to perform: decoding brain activity into a brain pattern sequence as an entry for a password into a locked device; applying brain dialogue to interact with a user while the user is entering the brain pattern sequence; matching the brain pattern sequence with a predetermined password to allow access to a system; and embedding an alarm module which activates when the user is under a threat as determined by the brain pattern sequence matching a security password as the predetermined password, wherein a signal is sent to a third-party when the alarm module activates as a result of the threat, and wherein the decoding deducts the brain pattern sequence by analyzing a signal slope of a sloe threshold the brain activity to determine a timing and a duration of the brain activity. ### Claim 11 (depends on 10) The computer program product of claim 10, wherein the brain activity is received via electroencephalography (EEG) of which is processed into a time domain feature, a frequency domain feature, a spatial domain feature, and a signal slope, wherein the brain activity is classified into user actions associated with the time domain feature, the frequency domain feature, the spatial domain feature, and the signal slope, and wherein the classified brain activity is matched with the predetermined password based on a threshold error compared to the time domain feature, the frequency domain feature, the spatial domain feature, and the signal slope of the brain activity. ### Claim 12 (depends on 10) The computer program product of claim 10, wherein the brain dialogue comprises a sensory signal to the user that is invisible to other users. ### Claim 13 (depends on 10) The computer program product of claim 10, wherein the brain pattern sequence comprises an element of a plurality of types of brain activity. ### Claim 14 (depends on 10) The computer program product of claim 10, further comprising combining multi-mode brain activities to confirm the brain pattern sequence. ### Claim 15 (depends on 10) The computer program product of claim 10, wherein the decoding the brain activity decodes the brain activity using at least one of motion imagery, P300, and Steady-State Visual Evoked Potentials (SSVEP). ### Claim 16 (depends on 10) The computer program product of claim 10, wherein the brain pattern sequence comprises a multi-sequence brain pattern sequence of which a user will obtain authorization directly if a recognition accuracy of a first brain activity is greater than a predetermined threshold to proceed to a next sequence of the multi-sequence brain pattern sequence, and wherein a time domain feature, a frequency domain feature, a spatial domain feature, and a signal slope of each brain activity are distilled and combined. ### Claim 17 (depends on 10) The computer program product of claim 10, wherein a signal slope is used to determine timing and a duration of brain patterns. ### Claim 18 An authentication system, said system comprising: a processor; and a memory, the memory storing instructions to cause the processor to perform: decoding brain activity into a brain pattern sequence as an entry for a password into a locked device; applying brain dialogue to interact with a user while the user is entering the brain pattern sequence; matching the brain pattern sequence with a predetermined password to allow access to a system; and embedding an alarm module which activates when the user is a under threat as determined by the brain pattern sequence matching a security password as the predetermined password, wherein a signal is sent to a third-party when the alarm module activates as a result of the threat, and wherein the decoding deducts the brain pattern sequence by analyzing a signal slope of a slope threshold of the brain activity to determine a timing and a duration of the brain activity.