protect confidential documents to control access. Apply specific restrictions, such
as preventing recipients from printing or modifying files, selecting text and images,
or creating and modifying electronic notes and form fields, to preserve document
validity.

Easily specify security settings to control access and restrict modifications
to confidential documents.
Authenticate content using digital signatures
Acrobat 4.0 for Windows supports both key-based and biometric digital signatures,
which you can use to authenticate authorship, track alterations, and verify approvals
of documents. Use the built-in Acrobat Self-Sign signatures for moderate security
needs or third-party solutions from Entrust, VeriSign,
PenOp, and others for high-security identification.

Use digital signatures to verify authenticity and track changes to
documents.
Distribute PDF files anywhere
When your documents are secure and ready for delivery, you can distribute them in
any medium. On your PC, automatically attach PDF files to e-mail messages using the convenient
Send Mail feature. Or quickly publish files on your intranet, Web site, network
server, or on CD-ROM. Because Acrobat is a truly universal application, your intended
recipients can use any language version of Acrobat 4.0 or Acrobat
Reader to view documents that contain text in any of 12 languages: English, French,
German, Japanese, Chinese Traditional, Chinese Simplified, Korean, Swedish, Spanish,
Dutch, Italian, and Brazilian Portuguese.
No matter how you publish your PDF files, you can rest assured that all of
your security options and other enhancements will remain in place and your recipients will be able to view, navigate, and print your documents exactly as you intended.