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JP-7854625-B2 - Authentication device and authentication method

JP7854625B2JP 7854625 B2JP7854625 B2JP 7854625B2JP-7854625-B2

Inventors

  • 福田 鉄平
  • 山崎 龍次

Assignees

  • パナソニックＩＰマネジメント株式会社

Dates

Publication Date
20260507
Application Date
20220610

Claims (10)

  1. An acquisition unit that acquires at least the first biometric information of the target to be authenticated for use in first biometric authentication and the first surrounding environment information at the time of acquisition of the first biometric information, A score calculation unit that calculates the score of the first biometric authentication using the first biometric information, A reliability determination unit that determines the reliability of the first biological information from the first surrounding environment information, The system includes a continuation processing determination unit that determines whether or not to perform a second biometric authentication using second biometric information different from the first biometric information, based on the score of the first biometric authentication and the confidence level of the first biometric information. The continuation processing determination unit determines that if the score of the first biometric authentication is greater than or equal to the first threshold but less than the second threshold, or if the score of the first biometric authentication is less than the first threshold and the confidence level of the first biometric information is less than the third threshold, the authentication result of the authentication target is determined to be the third determination, and the second biometric authentication is performed further. Authentication device.
  2. If the continuation processing determination unit determines the authentication result to be the third determination, it further performs the second biometric authentication using biometric information that is expected to have a high reliability. The authentication device according to claim 1 .
  3. An acquisition unit that acquires at least the first biometric information of the target to be authenticated for use in first biometric authentication and the first surrounding environment information at the time of acquisition of the first biometric information, A score calculation unit that calculates the score of the first biometric authentication using the first biometric information, A reliability determination unit that determines the reliability of the first biological information from the first surrounding environment information, The system includes a continuation processing determination unit that determines whether or not to perform a second biometric authentication using second biometric information different from the first biometric information, based on the score of the first biometric authentication and the confidence level of the first biometric information. The continuation processing determination unit determines, if the score of the first biometric authentication is equal to or greater than the second threshold, and the confidence level of the first biometric information is less than the fourth threshold, to set the authentication result of the authentication target as the fourth determination and to perform the second biometric authentication again. If the score of the second biometric authentication is equal to or greater than the second threshold, it is determined that the person being authenticated is the person in question. Authentication device.
  4. An acquisition unit that acquires at least the first biometric information of the target to be authenticated for use in first biometric authentication and the first surrounding environment information at the time of acquisition of the first biometric information, A score calculation unit that calculates the score of the first biometric authentication using the first biometric information, A reliability determination unit that determines the reliability of the first biological information from the first surrounding environment information, The system includes a continuation processing determination unit that determines whether or not to perform a second biometric authentication using second biometric information different from the first biometric information, based on the score of the first biometric authentication and the confidence level of the first biometric information. The continuation processing determination unit, If the score of the first biometric authentication is greater than or equal to the first threshold but less than the second threshold, or if the score of the first biometric authentication is less than the first threshold and the confidence level of the first biometric information is less than the third threshold, the authentication result of the authentication target shall be determined as the third determination. If the score of the first biometric authentication is equal to or greater than the second threshold, and the confidence level of the first biometric information is less than the fourth threshold, the authentication result of the authentication target is determined to be the fourth determination. In the case of the third and fourth determinations, it is determined that the second biometric authentication will be performed further. Authentication device.
  5. The system further includes an integrated determination unit that determines that the person being authenticated is the person in question if both the authentication result of the first biometric authentication using the first biometric information and the authentication result of the second biometric authentication using the second biometric information are either the third determination or the fourth determination, and the sum of the scores of the first and second biometric authentications is equal to or greater than a predetermined value. The authentication device according to claim 4 .
  6. The integrated determination unit determines that the person being authenticated is not the person in question if both the authentication result of the first biometric authentication using the first biometric information and the authentication result of the second biometric authentication using the second biometric information are either the third determination or the fourth determination, and the sum of the respective scores is less than a predetermined value. The authentication device according to claim 5 .
  7. The integrated determination unit calculates the false acceptance rate of the authentication target based on the authentication result of the first biometric authentication and the authentication result of the second biometric authentication. The authentication device according to claim 5 .
  8. An authentication method performed by an authentication device that authenticates the identity of the person being authenticated, The system acquires at least the first biometric information of the subject to be authenticated, which is used for the first biometric authentication, and the first surrounding environment information at the time the first biometric information was acquired. The score of the first biometric authentication using the first biometric information is calculated, The reliability of the first biological information is determined from the first surrounding environment information. Based on the score of the first biometric authentication and the confidence level of the first biometric information, a determination is made as to whether or not to perform a second biometric authentication using second biometric information different from the first biometric information. If the score of the first biometric authentication is greater than or equal to the first threshold but less than the second threshold, or if the score of the first biometric authentication is less than the first threshold and the confidence level of the first biometric information is less than the third threshold, the authentication result of the authentication target is determined to be the third determination, and it is determined to perform the second biometric authentication further. Authentication method.
  9. An authentication method performed by an authentication device that authenticates the identity of the person being authenticated, The system acquires at least the first biometric information of the subject to be authenticated, which is used for the first biometric authentication, and the first surrounding environment information at the time the first biometric information was acquired. The score of the first biometric authentication using the first biometric information is calculated, The reliability of the first biological information is determined from the first surrounding environment information. Based on the score of the first biometric authentication and the confidence level of the first biometric information, a determination is made as to whether or not to perform a second biometric authentication using second biometric information different from the first biometric information. If the score of the first biometric authentication is equal to or greater than the second threshold, and the confidence level of the first biometric information is less than the fourth threshold, the authentication result of the authentication target is determined to be the fourth determination, and it is determined to perform the second biometric authentication again. If the score of the second biometric authentication is equal to or greater than the second threshold, it is determined that the person being authenticated is the person in question. Authentication method.
  10. An authentication method performed by an authentication device that authenticates the identity of the person being authenticated, The system acquires at least the first biometric information of the subject to be authenticated, which is used for the first biometric authentication, and the first surrounding environment information at the time the first biometric information was acquired. The score of the first biometric authentication using the first biometric information is calculated. The reliability of the first biological information is determined from the first surrounding environment information. Based on the score of the first biometric authentication and the confidence level of the first biometric information, a determination is made as to whether or not to perform a second biometric authentication using second biometric information different from the first biometric information. If the score of the first biometric authentication is greater than or equal to the first threshold but less than the second threshold, or if the score of the first biometric authentication is less than the first threshold and the confidence level of the first biometric information is less than the third threshold, the authentication result of the authentication target shall be determined as the third determination. If the score of the first biometric authentication is equal to or greater than the second threshold, and the confidence level of the first biometric information is less than the fourth threshold, the authentication result of the authentication target is determined to be the fourth determination. In the case of the third and fourth determinations, it is determined that the second biometric authentication will be performed further. Authentication method.

Description

This disclosure relates to an authentication device and an authentication method. Patent Document 1 discloses a personal authentication system configured to perform personal authentication in response to an authentication request from a server. The personal authentication system includes authentication means that perform authentication using biometric information and output a score or its hash value, which represents the similarity of the biometric information. The personal authentication system also includes a score log storage unit that stores a log of the personal authentication score or its hash value obtained by the authentication means. The personal authentication system also includes a processing unit that, based on the score or its hash value log read from the score log storage unit, determines that authentication has failed if the same score is obtained multiple times consecutively. Japanese Patent Publication No. 2005-251215 A diagram illustrating an example of an authentication process for verifying identity.A diagram showing the hardware configuration of the authentication system according to this embodiment.Diagram showing the internal configuration of the processor according to this embodiment.A diagram showing an example of case classification of the determination result according to this embodiment.Flowchart showing the continuous processing of biometric authentication according to Embodiment 1Conceptual diagram of a case where a second biometric authentication method is selected based on the first biometric authentication method.This diagram shows an example of an authentication method when the reliability of all biometric authentication methods is low.This diagram illustrates an example where the results of multiple biometric authentication methods determine that the person being authenticated is not the person in question.Flowchart of the continuous processing of biometric authentication according to Embodiment 2This diagram illustrates an example of determining the first biometric authentication method based on information about the surrounding environment acquired before the authentication process begins.A diagram showing an example of the reliability of various biometric data. The following description will detail embodiments specifically illustrating the authentication device and authentication method described herein, with appropriate reference to the drawings. However, unnecessarily detailed explanations may be omitted. For example, detailed explanations of already well-known matters and redundant explanations of substantially identical configurations may be omitted. This is to avoid unnecessarily redundancy in the following explanation and to facilitate understanding for those skilled in the art. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this disclosure and are not intended to limit the subject matter of the claims. <Summary of the Invention> The authentication device 10 (see Figure 2) according to this embodiment authenticates the identity of the person to be authenticated by comparing pre-registered biometric information with biometric information acquired by various sensors. The authentication device 10 performs multimodal authentication based on multiple biometric information. The authentication device 10 compares the acquired biometric information of the person to be authenticated with pre-registered biometric information and calculates the agreement rate as a score. However, the quality of the biometric information may deteriorate depending on the environment in which the biometric information was acquired, which may worsen the accuracy of authentication. In addition, multimodal authentication takes time because it acquires multiple biometric information, which may increase the burden on the person to be authenticated. The authentication device 10 calculates the reliability of the score by estimating the quality of the biometric information, not just the score. By integrating multiple modal authentications while considering the reliability of this score, highly accurate and efficient authentication is achieved. Hereinafter, the index calculated based on the quality of the biometric information (in other words, an index that indicates whether or not the biometric data used for biometric authentication is reliable) will be referred to as the reliability. For example, the acquired biometric information is compared with pre-registered biometric information to calculate the score and the reliability of the score. Generally, biometric information acquired from sensors such as cameras or microphones contains not only information that represents the individual being authenticated, but also noise unrelated to that individual. For example, facial images contain noise inherent in the image itself, or noise from accessories such as glasses, sunglasses, or masks that are not directly related to the individua