クレジットカードはどこまで安全なのか 不正利用し続けることも可能？ – livedoor
livedoor |
クレジットカードはどこまで安全なのか 不正利用し続けることも可能？
livedoor クレジットカード番号は最大19桁までの数字の列である「PAN（Primary Account Number）」で成り立っているが、一般にはJCB、MasterCard、Visaのようなメジャーなカードブランドでは16桁、American Expressでは15桁となっている（カードブランドによっては13桁や14桁の … |
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