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信用卡CVV码是什么（用途是什么）

银行冲量 2023-03-03 10:41:30

信用卡CVV码是◤由卡号、有效期和服务约束码生成的3位或4位数字，一般写在卡磁条的2轨自定义数据区；即卡背面签名区后面的一串数字的后3到4位；CVV信息存储在磁条银行卡磁道中。根据卡号、轨迹主账号、发卡行标识代【码等信息，通过各银行定义的专用加 ...

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