Adobe Acrobat 7.0.5, Руководство пользователя

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Acrobat SDK User’s Guide
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Providing Document Security
Acrobat security is similar to home security. Just as you lock your doors to prevent someone
from entering your house without permission, you use Acrobat security features to lock a
PDF document. For example, you can use passwords to restrict users from opening,
printing, or editing PDF documents. You can use digital signatures to certify PDF
documents, and you can encrypt PDF documents so that only an approved list of users can
open them. To save security settings for later use, you can create a security policy that
stores security settings.
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This chapter focuses on how to use the Acrobat 7.0.5 SDK for security. For
information on how to view or modify security using Acrobat 7.0 Professional or
Acrobat 7.0 Standard, see the online help for each product.
This chapter consists of the following sections:
●
Acrobat Security Overview
●
Encryption and Decryption
●
Digital IDs and Certificates
●
Security Handlers
●
Digitally Signing Adobe PDF Documents
●
Security Policies
●
Using eEnvelopes to Send Secure Files
●
Document Rights
Acrobat Security Overview
You can use the following methods to enhance document security:
Password security Add passwords and set security options to restrict opening,
editing, and printing PDF documents. Acrobat supports 128-
bit RC4 and 128-bit AES (Advanced Encryption Standard)
security methods. You can choose which method to use when
securing documents.
Certification security Encrypt a document so that only a specified set of users have
access to it. See
“Encryption and Decryption” on page 92 .