We will use it to add, change, and remove password security features for the PDF documents within the Java applications. GroupDocs.Merger for Java is the API that allows to lock and unlock documents.

How to Remove PDF Password - Unlock PDF.Java API for Password Protection of PDF Files.The following topics are discussed below: Further, we will learn to change the password and also to remove the passwords to unlock PDF files. In this article, we will see how to programmatically add password protection to the PDF files within the Java applications. You can apply watermarks, encrypt files, or you can make your documents password-protected. File-based encryption gets unlocked only after you login, and deals with individual files and folders.There are different security levels that you can provide to your confidential documents. The feature encrypts the entire drive, not individual files – so once Windows starts, everything on the drive is decrypted and made available to everyone. This offers full-disk encryption with the keys tied down to a TPM, a hardware module dedicated to certificate storage.īitLocker operates at a different level to file-based encryption, solving different problems. Enabling Windows' BitLocker feature (Pro and Enterprise edition only) can also give peace of mind if you want all your files to be encrypted. If you need stronger protections, you might want to consider investing in third-party software that's specially designed for this purpose. Just remember to lock your account (Win+L) whenever you walk away from the screen – your files will be unencrypted as soon as you login! However, it's ideal if you're using a shared PC and just want to keep some files inaccessible to other user accounts on the device. Once again, we'll remind you this method isn't intended for high-security purposes. After encryption, you can also press the 'Details' button next to the checkbox to see information about the encryption certificate and available recovery procedures. Just untick the 'Encrypt contents to secure data' checkbox and click OK to close the windows. You can reverse the encryption at any time by heading back to the Properties window and opening the Advanced Attributes pane again.

Password protect existing pdf files