Hi,
I've pretty much exhausted my Google search skills in trying to find any posts covering AES encryption with PDFBox. I'm looking for the simplest implementation. It appears I need a StandardSecurityHandler or PublicKeySecurityHandler and apparently the StandardProtectionPolicy (which is well documented in the Encrypt class), but I keep trying to bang them together and nothing useful happens. In one of my clearly naive attempts I do something like this (the only thing that isn't based on the Encrypt example is the attempt to use the StandardSecurityHandler...obviously incorrectly): StandardSecurityHandler ssh = new StandardSecurityHandler(spp); ssh.setKeyLength(KEY_LENGTH); ssh.setAES(true); AccessPermission ap = new AccessPermission(); // set various permissions StandardProtectionPolicy spp = new StandardProtectionPolicy(OWNER_PASSWORD, null, ap); spp.setEncryptionKeyLength(KEY_LENGTH); document.setSecurityHandler(ssh); // Seems to be the way to set a security handler document.protect(spp); // Completely ignores AES (I get the default 128-bit RC4 encryption) As noted in the comments above, this correctly locks the PDF but sets 128-bit RC4 encryption as opposed to AES. Thanks in advance for any suggestions. John
