Pin numbers in chip cards have made signature's less necessary.

芯片卡上的密码使签名变得不那么必要了。

On a chip card the data is randomized, which means it's only good for one transaction.

在芯片卡上，数据是随机的，这意味着它只适用于一次交易。

Chip cards, credit cards with tiny microchips have been increasingly used in the U.S. since 2015. The old type of card which utilized a magnetic strip was easier to hack and steal information from.

自 2015 年以来，芯片卡、带有微型芯片的信用卡在美国的使用越来越多。使用磁条的旧式卡更容易被黑客入侵和窃取信息。