Biometric authentication method and apparatus

1. A biometric authentication method, comprising:

determining a first similarity between first biometric data and first registration data;

determining a second similarity between second biometric data and second registration data;

performing authentication based on the first similarity and the second similarity; and

updating the first registration data based on the first biometric data in response to the first similarity being greater than an authentication reference value corresponding to the first similarity and the second similarity being greater than an update reference value corresponding to the second similarity,

wherein a type of biometric information in the first biometric data is different than a type of biometric information in the second biometric data.

2. The method of claim 1 , further comprising:

updating the second registration data based on the second biometric data in response to the first similarity being greater than an update reference value corresponding to the first similarity and the second similarity being greater an authentication reference value corresponding to the second similarity.

3. The method of claim 2 , wherein the update reference value corresponding to the first similarity is greater than the authentication reference value corresponding to the first similarity, and the update reference value corresponding to the second similarity is greater than the authentication reference value corresponding to the second similarity.

4. The method of claim 1 , wherein the performing authentication comprises:

determining the authentication to be successful in response to the first similarity being greater than the authentication reference value corresponding to the first similarity and the second similarity being greater than an authentication reference value corresponding to the second similarity; and

determining the authentication to be unsuccessful in response to the first similarity being less than or equal to the authentication reference value corresponding to the first similarity or the second similarity being less than or equal to the authentication reference value corresponding to the second similarity.

5. The method of claim 2 , wherein the updating the second registration data comprises:

storing feature information of the second biometric data as part of the second registration data.

6. The method of claim 1 , wherein the first biometric data includes face information of a user, and the second biometric data includes fingerprint information of the user.

7. A biometric authentication method, comprising:

determining,

a first similarity between first biometric data and first registration data of a registered user,

a second similarity between second biometric data and second registration data of the registered user,

a third similarity between the first biometric data and third registration data of another user, and

a fourth similarity between the second biometric data and fourth registration data of the other user; and

performing authentication based on the first similarity, the second similarity, the third similarity, and the fourth similarity,

wherein a type of biometric information in the first biometric data is different than a type of biometric information in the second biometric data.

8. The method of claim 7 , further comprising:

updating the third registration data based on the first biometric data and updating the fourth registration data based on the second biometric data in response to the first similarity being less than or equal to an authentication reference value corresponding to the first similarity and the second similarity being less than or equal to an authentication reference value corresponding to the second similarity.

9. The method of claim 7 , further comprising:

updating the first registration data based on the first biometric data in response to the first similarity being greater than an authentication reference value corresponding to the first similarity and the second similarity being greater than an update reference value corresponding to the second similarity; and

updating the second registration data based on the second biometric data in response to the first similarity being greater than an update reference value corresponding to the first similarity and the second similarity being greater than an authentication reference value corresponding to the second similarity.

10. The method of claim 7 , wherein the performing authentication comprises:

determining authentication performed on the first biometric data to be successful in response to the first similarity being greater than an authentication reference value corresponding to the first similarity and the third similarity.

11. The method of claim 7 , wherein the performing authentication comprises:

determining authentication performed on the second biometric data to be successful in response to the second similarity being greater than an authentication reference value corresponding to the second similarity and the fourth similarity.

12. The method of claim 7 wherein,

the first biometric data, the first registration data, and the third registration data include a same type of biometric information, and

the second biometric data, the second registration data, and the fourth registration data include a same type of biometric information.

13. A non-transitory computer readable medium storing computer-executable instructions that, when executed by at least one processor, cause the at least one processor to perform operations including,

determining a first similarity between first biometric data and first registration data,

determining a second similarity between second biometric data and second registration data,

performing authentication based on the first similarity and the second similarity, and

updating the first registration data based on the first biometric data in response to the first similarity being greater than an authentication reference value corresponding to the first similarity and the second similarity being greater than an update reference value corresponding to the second similarity,

wherein a type of biometric information in the first biometric data is different than a type of biometric information in the second biometric data.

14. A biometric authentication apparatus, comprising:

memory storing computer-executable instructions; and

one or more processors configured to execute the instructions such that the one or more processors are configured to,

determine a first similarity between first biometric data and first registration data and a second similarity between second biometric data and second registration data,

perform authentication based on the first similarity and the second similarity, and

update the second registration data based on the second biometric data in response to the first similarity being greater than an update reference value corresponding to the first similarity and the second similarity being greater than an authentication reference value corresponding to the second similarity,

wherein a type of biometric information in the first biometric data is different than a type of biometric information in the second biometric data.

15. A biometric authentication apparatus, comprising:

memory storing computer-executable instructions; and

one or more processors configured to execute the instructions such that the one or more processors are configured to,

determine,

a first similarity between first biometric data and first registration data of a registered user,

a second similarity between second biometric data and second registration data of the registered user,

a third similarity between the first biometric data and third registration data of another user, and

a fourth similarity between the second biometric data and fourth registration data of the other user; and

perform authentication based on the first similarity, the second similarity, the third similarity, and the fourth similarity,

wherein a type of biometric information in the first biometric data is different than a type of biometric information in the second biometric data.

16. The apparatus of claim 15 , wherein the one or more processors are configured to execute the instructions such that the one or more processors are configured to update the third registration data based on the first biometric data and update the fourth registration data based on the second biometric data, in response to the first similarity being less than or equal to an authentication reference value corresponding to the first similarity and the second similarity being less than or equal to an authentication reference value corresponding to the second similarity.

17. The apparatus of claim 15 , wherein the one or more processors are configured to execute the instructions such that the one or more processors are configured to output a warning message or lower an authentication reliability of the first biometric data, in response to the first similarity being greater than an authentication reference value corresponding to the first similarity and the fourth similarity being greater than the second similarity.

18. The apparatus of claim 15 , wherein the one or more processors are configured to execute the instructions such that the one or more processors are configured to output a warning message or lower an authentication reliability of the second biometric data, in response to the second similarity being greater than an authentication reference value corresponding to the second similarity and the third similarity being greater than the first similarity.