Read in Exif header data from JPG files.

从JPG文件读入exif头部数据。

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Listing 1 provides the Ethernet header data.

清单1提供了Ethernet报头数据。

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The penultimate section, Listing 4, shows the RPC header data.

清单4的倒数第二部分显示的是RPC报头数据。

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In the text payload, a section called UDH (User Data Header) is optional but defines lot of advanced features not all mobiles are compatible with.

FORBES: French Hacker Claims That Every Single iPhone Ever Made Vulnerable To SMS Spoofing Bug

As Apple is using the reply-to address of a message's User Data Header to identify the origin rather than the raw source, receiving iPhone owners risk being fooled by a phishing attack (or just a dishonest acquaintance) that poses as a contact or a company.

ENGADGET: iPhone reportedly vulnerable to text message spoofing flaw

Some forge their e-mail header--the data above and below an e-mail that contains information about the recipient and sender.

FORBES: Spam Warfare