How to encrypt a PDF document

Confidential PDF documents can be encrypted and protected with a password. Only people who know the password will be able to decrypt, open and view those ... PDFAnnotator Step-by-stepTutorials HowtoencryptaPDFdocument EncryptingaPDFdocumentprotectsitscontentfromunauthorizedaccess. ConfidentialPDFdocumentscanbeencryptedandprotectedwithapassword. Onlypeoplewhoknowthepasswordwillbeabletodecrypt,openandviewthosedocuments. Let'sseehowencryptingaPDFdocumentworks. OpentheunprotectedfileinPDFAnnotator. OnthePDFAnnotatormenu,selectFile,Properties. OntheDocumentPropertiesdialog,clicktheSecuritytab (1). UnderDocumentSecurity,clickSetPassword&Restrictions (2). InthePasswordSecuritydialog,checktheRequirepasswordtoopenthedocumentoptionand enterthePasswordtoopendocument. RepeatthepasswordintheConfirmpasswordfield. ThisfirstpasswordyouenteredistheOpenPassword. Itwillberequiredtoopenthedocument,butitwillnotbepossibletoaltertheencryptionusingonlythispassword. Next,checktheRestricteditingandprintingthedocumentoptionand enterthePasswordtochangeaboverestrictions. RepeatthepasswordintheConfirmpasswordfield. ThissecondpasswordyouenteredisthePermissionsPassword. Thispasswordisrequiredifyoulaterwanttoaltertheencryptionsettings. Important:Makesurethatthesetwopasswordsaredifferent! ClickOKtoconfirmthenewsettings. BackunderDocumentSecurity,youcannowseethatSecuritychangedtoOpenPassword,Restrictions. ConfirmonemoretimewithOK. Anoticewillexplainthatthenewsecuritysettingswillonlybeineffectonceyousaveandre-openthedocument. Let'strythepasswordprotection. Saveandclosethedocument,thenre-openitinPDFAnnotator. Whenre-openingthedocument,youwillnoticethatPDFAnnotatorwillnowaskfortheOpenPassword. ThesamewillapplytoanyotherPDFreader.AnyPDFsoftwarewillrequirethepasswordtobeabletodecryptand display(orevenprint)thedocument. Onceyouenterthecorrectpassword,thedocumentcanbedisplayed. Removingencryptionandpasswordprotection OnceyouenteredtheOpenPassword,youcanagaingotoFile,Properties,switchtothe Securitytab,andreviewthesecuritysettings. HereyoucanremovethepasswordprotectionbyclickingRemove. Important:Afilewithoutpasswordprotectionwillalsoloseitsdecryption. Asyousee,youwillberequiredtoenterthePermissionsPasswordtoremovethepasswordprotectionand encryption. Andbytheway,ifyouwanttochangetheSecurityLevel,thestrengthoftheencryption,youcandosounder Compatibility: KeepinmindthatolderPDFprogramsdonotsupportmorerecentsecuritylevels. Read HowtopasswordprotectaPDFdocument tolearnmoreaboutPDFpasswordprotection. AllStep-by-StepTutorials LearnaboutPDFAnnotator × Close