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  3. Certificates are（ ）documents attesting t

Certificates are（ ）documents attesting t

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问题 Certificates are（ ）documents attesting to the （ ） of a public key to an individual or other entity. They allow verification of the claim that a given public key does in fact belong to a given individual. Certificates help prevent someone from using a phony key to（请作答此空）someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a Certificate also contains an （ ）date, the name of the CA that issued the Certificate, a serial number, and perhaps other information. Most importantly, it contains the digital（ ）of the certificate issuer. The most widely accepted format for certificates is X.509, thus, Certificates can be read or written by any application complying with X.509.A.impersonate]B.personate]C.damage]D.control
选项 A.impersonate]
B.personate]
C.damage]
D.control
答案 A
解析 证书是一种数字文档，用于表明把一个公钥绑定到一个人或其他实体。用它可以验证一个给定的公钥确实属于某一个人。证书可以防止某些人使用假冒的密钥去冒充别人。最简单的证书包含一个公钥和一个名字。通常使用的证书也包含超时日期、发行证书的 CA的名字、一个序列号，以及其他信息。最重要的是，它包含了证书发行者的数字签名。最广泛接受的证书格式是X.509，这样的证书可以被任何服从X.509标准的应用读或写。
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