Using Acrobat X compatible encryption and a long unguessable password should be much as secure as any other password protected file. Of course, once the password is revealed to anyone, the file and password can be freely shared.
Adobe Acrobat offers advanced PDF security features such as encryption and password protection to keep your PDF files safe.
For a full list of articles about security, see Overview of security in Acrobat and PDF content. Acrobat DC and Acrobat Reader DC warn you any time you try to open a URL (website) or a file attachment that uses a disallowed file type.
What type of encryption does Adobe Acrobat support?
Adobe Acrobat XI supports both the use of a password or certificate to encrypt the PDF document itself. Use of a plain password is defaulted at a 128-bit AES encryption level. This algorithm is strong, but obviously requires a key that is strong as well. 128-bit AES is supported from Acrobat 7 and later.
Acrobat 6.0 And Later (PDF 1.5) encrypts the document using 128-bit RC4. Acrobat 7.0 And Later (PDF 1.6) encrypts the document using the AES encryption algorithm with a 128-bit key size.
How do I password protect a PDF in Acrobat DC?
Open the PDF in Acrobat DC, and do one of the following: 1 Choose Tools > Protect > More Options > Encrypt with Password.
Is it possible to secure a PDF file?
On the same note, you can have the most secure password in the world, but if the same attacker that wants access to that PDF has a key-logger on your computer, consider it compromised. Now if you meant security in terms of the PDF file potentially containing malicious code: There are a few methods.
As for the “master” password. Adobe Acrobat XI supports both the use of a password or certificate to encrypt the PDF document itself. Use of a plain password is defaulted at a 128-bit AES encryption level. This algorithm is strong, but obviously requires a key that is strong as well. 128-bit AES is supported from Acrobat 7 and later.
Documents can be secured in several ways. To view the security settings of a document, choose File > Properties in Acrobat or Reader. From the Document Properties dialog box, click the Security tab. If you have trouble opening a PDF, or you’re restricted from using certain features, contact the author of the PDF.
What is acrobat com?
Com is the web version of Acrobat developed by Adobe Inc. to edit, create, manipulate, print and manage files in the Portable Document Format (PDF). It is currently available for users with a web browser and an Adobe ID only.