安全方法是无安全性但不允许页面提取和文档组装 [英] Security Method is No Security but Page Extraction and Document Assembly is not Allowed
问题描述
我有一个非常奇怪的问题，我不确定问题出在哪里.我正在创建 PDF 并且没有设置任何安全限制或密码.当我在 Adobe Reader DC 中打开 PDF 并获取属性时，它确实将安全方法显示为无安全性.但是，文档组装和页面提取设置为不允许.
I have a very strange problem and I am not sure where the issue is. I am creating a PDF and not setting any security restrictions or a password. When I open the PDF in Adobe Reader DC and get the properties,it does show the Security Method as No Security. However, the Document Assembly and Page Extraction are set to Not Allowed.
PDF 是从 Word 文档创建的，我只是将其另存为 PDF，没有其他选项.
The PDF was created from a Word document and I simply did a save as PDF, no other options.
推荐答案
总则
请注意文件限制摘要"总结了由多种因素引起的限制，我想到了以下几点:
In General
Please be aware that the "Document Restrictions Summary" summarizes restrictions that arise from a number of factors, the following ones coming to my mind:
加密过程中的限制
在加密 PDF 时，可以限制普通用户对许多功能的权限.因此，如果使用用户密码打开 PDF，则这些限制适用并显示在摘要中；如果使用所有者密码打开，则不适用.
When encrypting a PDF, permissions for a number of features can be restricted for a regular user. Thus, if the PDF is opened with the user password, these restrictions apply and are shown in the summary; if it is opened with the owner password, they don't apply.
这些是人们在检查文档属性安全选项卡时通常会想到的限制.
These are the restrictions one usually thinks of when checking the document properties Security tab.
签署(认证和批准)过程中的限制
当使用集成签名对 PDF 进行数字签名时，许多功能会自动受到限制，并且可能会限制更多功能，具体取决于签名应用的 MDP 转换和锁定.这些限制也显示在摘要中.
When a PDF is digitally signed with an integrated signature, a number of features are automatically restricted, and some more features may be restricted depending on the MDP transforms and locks applied by the signatures. These restrictions also are shown in the summary.
所用查看器软件应用的限制
您使用的查看器可能会限制您对 PDF 的操作，例如Acrobat Pro 版本的许多功能在 Adobe Reader 中不存在或存在但默认禁用.这些限制也出现在摘要中.
The viewer you use may restrict what you can do with a PDF, e.g. a number of features of the Acrobat Pro editions are not present in Adobe Reader or are present but by default disabled. These restrictions also appear in the summary.
这些与查看器相关的限制甚至可能因您拥有的文档类型而异.例如.在 Adobe Reader 中，它们在带有 XFA 表单定义的 PDF 文档和不带有的 PDF 文档之间有所不同.
These viewer related restrictions may even differ based on the kind of document you have. E.g. in Adobe Reader they differ between PDF documents carrying a XFA form definition and those that don't.
使用权限签名(又名阅读器启用)更改的限制
有一种特殊的PDF签名(使用权限签名)，可以解除浏览器软件的一些限制.如果 PDF 包含这样一个有效的使用权签名，则可能会启用查看器的一些通常禁用的功能，这一事实也反映在摘要中.
There is a special kind of PDF signature (usage rights signatures) which can lift some restrictions caused by the viewer software. If a PDF contains such a valid usage rights signature, some usually disabled features of the viewer may be enabled, a fact which also reflects in the summary.
如果 PDF 包含已失效的使用权签名，例如通过对文档进行不允许的更改，不仅那些通常被禁用的功能仍然被禁用，而且更多的功能可能会被禁用，这再次显示在摘要中.
If a PDF contains a usage rights signature which has been invalidated, e.g. by disallowed changes to the document, not only those usually disabled features remain disabled but some more features may become disabled, which again shows in the summary.
可能还有其他因素......
There may be additional factors still...
不允许"您在 Adobe Reader DC 中看到的文件条目是上面列出的第三种类型的限制，它们是所用查看器软件应用的限制.如果您在 Acrobat 高级版本中打开文件，这些条目将成为允许".
The "Not Allowed" entries you see for your file in Adobe Reader DC are restrictions of the third type listed above, they are restrictions applied by the viewer software used. If you opened the file in a superior Acrobat edition, those entries would become "Allowed".
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