The paper briefly introduces the principle of sub-network connection protection and the definition of J1 byte. On the ground of that, analyzes the application of J1 byte in the SNCP.

本文主要阐述了子网连接保护（SNCP）的工作原理及J1字节的详细定义，并对J1字节在SNCP保护中的处理方法进行了具体分析。

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SEC_CIRCUIT_AUTH — Use SSL security for privacy and integrity protection only on the initial request (while establishing the connection).

SEC_CIRCUIT_AUTH——仅在初始化的请求中(当建立连接时)使用SSL安全用于私有性及完整性保护。

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SEC_PACKET_INTEGRITY — Use SSL security for privacy and integrity protection on the initial request (while establishing the connection) and for integrity protection on all other requests.

SEC_PACKET _ INTEGRITY——在初始化的请求中(当建立连接时)使用SSL安全用于私有性及完整性保护，并在所有其它的请求中用于完整性保护。

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And given how many people get viruses from their friends, it might also be seen as public-spirited for individuals to get protection before they make a connection.

ECONOMIST: A new way of thwarting viral epidemics on computers

But when things are happening live in front of a camera, the flagging feature is no protection against what anyone with an Internet connection might be able to see.

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While the survey shows more than 90 percent of businesses are using firewalls and anti-virus solutions to protect their networks, that protection is useless once employees use a remote connection to access work-related documents.

FORBES: Securing Corporate Data In An Increasingly Mobile World