KeyInfo is optional for two reasons.
KeyInfo是选择性的有两个原因。
KeyInfo indicates the key to be used to validate the signature.
KeyInfo表示用于验证签名的金钥。
The ds: KeyInfo element in Listing 8 contains a KeyName element.
清单8中的ds：KeyInfo元素包含一个KeyName元素。
Before this validation can happen, the KeyInfo must also be validated to ensure the certificate is valid.
在能够进行验证之前，还必须验证KeyInfo以确保证书是有效的。
Note that the root element of this structure is EncryptedKey, which contains the ds: KeyInfo and ds: KeyValue elements.
请注意这个结构的根元素是EncryptedKey，它包含ds：KeyInfo和ds：KeyValue元素。
Figure 7 shows how the different parts of this envelope are linked, meaning the KeyInfo field points to the certificate in the message.
图7显示了该信封的不同部分如何联系在一起，意味着keyinfo字段指向消息中的证书。
Figure 7 shows how the different parts of this envelope are linked, meaning the KeyInfo field points to the certificate in the message.
图7显示了该信封的不同部分如何联系在一起，意味着keyinfo字段指向消息中的证书。
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