Quick Answer
What security information does this reveal? Encryption type, password protection status, permissions (print, copy, edit), digital signature status, and certificate details -- all without requiring you to enter any passwords.
Frequently Asked Questions
Encryption algorithm (AES-128, AES-256, RC4), document and user password protection status, permission restrictions (printing, copying, editing, annotating), digital signature status, and certificate details.
No -- the security checker only reports the current security settings. Use the Unlock PDF tool to remove password protection from PDFs where you have authorization to do so.
No -- the tool can report security settings without the password. Password-protected PDFs reveal their encryption type and permission settings even when locked.
40-bit RC4 (PDF 1.1 to 1.3, legacy), 128-bit RC4 (PDF 1.4), 128-bit AES (PDF 1.5 to 1.6), and 256-bit AES (PDF 1.7+). Higher numbers indicate stronger, more modern encryption.
Permissions control what readers can do with the document: print (low or high quality), copy text and images, edit content, add annotations, fill forms, and extract pages. The checker shows the status of each permission.