Checksum of device drivers and methods.

设备驱动器和方法的校验和。

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Then, before trusting the input data, verify that the checksum matches.

然后，在输入数据前，先验证检验和是否匹配。

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When a page is scanned, its checksum is calculated and stored with the page.

当一个页面被扫描时，它的校验和被计算且与该页面存储在一起。

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The key turns out to be predictable given that it is sequentially issued and constructed from the passport expiry date, birth date, passport number, and checksum.

ENGADGET: Dutch RFID e-passport cracked -- US next?

They may insert themselves into unused space within a binary so as not to change the size or other characteristics of those files (though they would affect a checksum).

CNN: Technology - Analysis: Understanding viruses