Electronic device and control method

The invention relates to an electronic device and a control method. The electronic device includes a communication unit and a control unit. And a communication unit that performs authentication communication to authenticate an external device connected to the electronic device. And a control unit that sets the time limit of the authentication communication to a predetermined time when the external device is the first device. The predetermined time is a time longer than a time required for authentication communication between the first device and the electronic device and shorter than a time required for authentication communication between the electronic device and a second device different from the first device. 本公开涉及电子装置及控制方法。该电子装置包括通信单元和控制单元。通信单元，其进行认证通信以认证连接到电子装置的外部装置。控制单元，其在外部装置是第一装置的情况下，将认证通信的时间限制设置为预定时间。预定时间是比第一装置和电子装置之间的认证通信所需的时间长、并且比电子装置和第二装置之间的认证通信所需的时间短的时间，第二装置不同于第一装置。