Amazon.co.jp has supported 2-step verification function. This will allow you to strongly protect Amazon accounts that have registered addresses, phone numbers, credit card information, etc. by 2-step ...

This is "FIDO U2F Security Key". The size of the FIDO U2F Security Key is smaller than that of a general USB flash drive. When using 2 step verification, plug it in the USB port and use it. To use ...