CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is based on and claims priority under 35 U.S.C. § 119 of a Korean patent application number 10-2018-0085619, filed on Jul. 23, 2018, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety.

BACKGROUND

1. Field

The disclosure relates to an electronic apparatus performing a user authentication. More particularly, the disclosure relates to an electronic apparatus in which a user biometric authentication is performed based on input user authentication information and the number of a user authentication failure even though the user authentication is successful.

2. Description of Related Art

For security of an electronic apparatus, the prior art keeps the electronic apparatus to be in a lock state, thereby preventing the electronic apparatus from performing functions thereof or from executing an application stored therein. Also, the prior art utilizes a mechanism in which the electronic apparatus is switched to be in a lock release state only when a specific user authentication is input.

For the user authentication, an authentication such as a password input or a pattern input has been generally used, and recently, user biometric authentication such as the user fingerprint authentication, iris authentication, voice authentication, and face authentication has been used more frequently.

However, the password input or the pattern input may be an authentication type relatively easily solved by a person other than a user of the electronic apparatus. Whereas, the user biometric authentication is not easy for others to solve, but an authentication process is bothersome and time-consuming. Therefore, it is necessary to use these various types of authentication in a timely manner.

The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure.

SUMMARY

Aspects of the disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide as least the advantages described below. Accordingly, an aspect of the disclosure is to provide an electronic apparatus and a controlling method thereof, in which a user authentication is performed to switch the electronic apparatus to be in a lock release state based only on simple information input such as password input or pattern input. However, a user biometric authentication is further performed depending on the number of a user authentication failure, thereby relieving inconvenience in the user biometric authentication and enhancing security of the electronic apparatus.

Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments.

In accordance with an aspect of the disclosure, an electronic apparatus is provided. The electronic device includes an input and at least one processor configured to perform a user authentication based on user authentication information input through the input and user authentication information pre-stored in the electronic apparatus while the electronic apparatus is in a lock state, switch the electronic apparatus to be in a lock release state when the user authentication is successful, and enhance security for use of the electronic apparatus in the lock release state when the user authentication is successful based on the user authentication information input after a user authentication failure occurs from the input of the user authentication information input a predetermined number of times or more.

Here, the at least one processor may further be configured to perform user re-authentication based on user biometric information input through the input when the user authentication is successful based on the user authentication information input after the user authentication failure occurs from the input user authentication information the predetermined number of times or more.

In this case, the user authentication information may include a predetermined pattern or a password, and the user biometric information may include user fingerprint or user iris.

In addition, the at least one processor may further be configured to switch the electronic apparatus back to be in the lock state in a situation where the user re-authentication failure occurs.

Meanwhile, the at least one processor may further be configured to perform the user re-authentication when a predetermined application is executed in a situation where the electronic apparatus is in the lock release state.

Here, the predetermined application may include at least one of an application set to perform an automatic user login or an application storing user personal information, among applications providing a service requiring a user login.

Meanwhile, the at least one processor may further be configured to enhance security for lock of the electronic apparatus in the lock state in a situation where the user authentication failure occurs the predetermined number of times or more.

In this case, the at least one processor may further be configured to obtain the user biometric information through the input and perform the user re-authentication based on the input user biometric information while the user inputs the user authentication information to switch the electronic apparatus to be in the lock release state in a situation where the user authentication failure occurs the predetermined number of times or more.

Here, the at least one processor may further be configured to keep the electronic apparatus to be in the lock state in a situation where the user re-authentication failure occurs.

In accordance with another aspect of the disclosure, a controlling method of an electronic apparatus is provided. The controlling method of an electronic apparatus includes performing a user authentication based on input user authentication information and pre-stored user authentication information in the electronic apparatus while the electronic apparatus is in a lock state, switching the electronic apparatus to be in a lock release state when the user authentication is successful, and enhancing security for use of the electronic apparatus in the lock release state when the user authentication is successful based on the user authentication information input after a user authentication failure occurs from the input user authentication information a predetermined number of times or more.

In this case, in the enhancing of the security for the use of the electronic apparatus, user re-authentication may be performed based on input user biometric information when the user authentication is successful based on the user authentication information input after the user authentication failure occurs from the input user authentication information the predetermined number of times or more.

Here, the user authentication information may include a predetermined pattern or a password, and the user biometric information may include user fingerprint or user iris.

In addition, in the enhancing of the security for the use of the electronic apparatus, the electronic apparatus may be switched back to be in the lock state when a user re-authentication failure occurs.

Meanwhile, in the enhancing of the security for the use of the electronic apparatus, the user re-authentication may be performed when a predetermined application is executed in a situation where the electronic apparatus is in the lock release state.

Here, the predetermined application may include at least one of an application set to perform an automatic user login or an application storing user personal information, among applications providing a service requiring a user login.

Meanwhile, the controlling method may further include enhancing security for lock of the electronic apparatus in the lock state in a situation where the user authentication failure occurs the predetermined number of times or more.

Here, in the enhancing of the security for the lock of the electronic apparatus, the user biometric information may be obtained and the user re-authentication may be performed based on the input user biometric information while the user inputs the user authentication information to switch the electronic apparatus to be in the lock release state in a situation where the user authentication failure occurs the predetermined number of times or more.

In this case, in the enhancing of the security for the lock of the electronic apparatus, the electronic apparatus may be kept to be in the lock state when the user re-authentication failure occurs.

Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure.

