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Is there a way to create a pdf file that is not only encrypted for security purposes but also prevents the reader from saving the file onto their hard drive?

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No, you can't prevent the user from saving the file to their hard drive from the web.

Posted on Oct 05, 2009

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2 Answers

Pdf files garbled


The PDF, or portable document format, file bridges the gaps between many software programs. Someone using one program to create a file need not worry that his intended recipient have that same program, because PDFs just require a free software program to open. On occasion, it may seem like a PDF is just as hard to open as a native file created in that proprietary software, but one of a variety of factors may contribute to the unreadability problem.

Software
One of the most common reasons a PDF is unreadable -- and the easiest to fix -- is that the person trying to open the PDF doesn't have the software to do so. To open a PDF requires the free downloadable program Reader, created and distributed by Adobe, which also makes the PDF-creation software Acrobat. A person who doesn't have Reader installed won't see the familiar red-and-black PDF icon; they'll see a white box symbolizing that the computer doesn't know how to read the file. b> Zoom b> Although it seems quite obvious, a person's screen resolution may have everything to do with why a PDF appears unreadable. Since PDFs are often scans or saved files of standard 8.5-by-11-inch paper, small fonts and occasionally handwriting can get be scaled to tiny dimensions when the sheet is viewed full . Zoomed out, a heavily typed or scrawled PDF may appear as a bunch of jumbled black dots and lines instead of the clear text it would be when zoomed in. Conversion b> Even if you have the Reader software installed, trying to open a PDF in a program that doesn't allow it will cause problems. For example, the Reader software doesn't let you edit a PDF -- you need Acrobat for that -- but you can still use other programs to do things such as redacting, or making black lines to obscure information. You can open a PDF in a program such as Adobe Photoshop and have the PDF be completely readable. On the other hand, if you try to open a PDF in Windows Paint, the operating system's native graphics tool, it will be unreadable because Paint does not accept PDF files. b> Missing Elements b> Something that appears perfectly readable on one person's screen may look entirely unreadable on another, solely because of what's missing from the file. In some cases, a PDF that looks jumbled is a result of missing fonts. While it may seem simple to just create a PDF from whatever document you're working on, if the person who receives your PDF doesn't have those fonts installed, the PDF may be unreadable. You can combat this one of two ways -- try to use universal fonts, such as Helvetica; or take the extra steps to embed the fonts into the PDF. This requires use of Distiller, also an Adobe product. An unreadable PDF may also be missing the password or certificate to render the document readable. Contact the person who created the PDF to inquire whether he locked it with an encryption. Encryption is removable with a key or password. Hope this helps.

Dec 13, 2012 | Computers & Internet

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PDF encryption, set PDF password and recover PDF password


PDF encryptionGenerally, PDF files are with a password called User Password, which is used to open the file and view the document. To encrypt a PDF password does not simply mean you can’t open and view the document, but PDF files have five to seven encryption ways to protect the file for office needs. Owner password, the other password of PDF files, is another crucial PDF password, which is to protect the file from maybe being copied (to Clipboard), printed, or modified, etc. So, in speaking of PDF password, it doesn’t necessary mean the one which you use to open the file.
PDF encryption largely relies on the sophisticated algorithm that hardly to be reversed. For example, you are easy to calculate that 1000 plus 1 is 1001, however, the reverse is seemed impossible, for 1001 can be an answer of countless calculations. PDF encryption works in the similar way. In this sense, given a password, it’s easy to deduce and decipher some data; however, the reverse PDF password recovery seems impossible.
Generally speaking PDF encryption with 128 bits key value is much more secure than that of 32 bits. PDF encryption is accomplished by a key value, either 128 or 32 bits in size. When using the key, all the bytes are changed (unless they are decoded back with the same key) into meaningless codes, and the file is impossible to be opened. Only the meaningless codes are calculated back using the correct value is it possible to get the correct password and open the file. 128 bits has a lot more possible values than the one with 32 bits, so it is much more secure. If your password is forgotten and intend to recover PDF password, PDF Password Unlocker software could be faster, for it supports 128 bits encryption, either 128 bits RC4 or 128 bits AES encryption.

PDF files are composed with objects, like image Objects, graphic Objects, and text Objects, etc. The key is calculated for each PDF Object in the PDF file using local data, which is much hard to crack, as the key keeps changing.
Set and remove PDF passwordsAdd a PDF Password1. Click the Secure button pdf-encryption-and-pdf-password-recovery_clip_image002.jpg in the Tasks toolbar, and choose Password Encrypt.
2. Click “Yes” to the prompt about changing the security, and if necessary, type the Permissions password that lets you change security settings. If you don’t know the password, contact the author of the PDF.
3. In the Password Security - Settings dialog box, set the security options as desired, confirm the password, click OK, and then click OK again.
4. Save the document to apply the security settings.
Note: You can also restrict editing capabilities when you certify a document, or when you apply a policy to a PDF.
Remove PDF passwords and security settingsYou can remove PDF passwords and security policies from an open PDF if you have the permissions to do so. If the PDF is secured with a security policy that resides on a server, the changes can be made only by the author of the policy or by a server administrator.
1. Do one of the following: Click the Secure button pdf-encryption-and-pdf-password-recovery_clip_image002_0000.jpg in the Tasks toolbar, and choose Remove Security.
Type your password, and click Yes to the prompt about removing the security.
In the Security tab of the Document Properties dialog box, choose No Security from the Security Method menu.
2. When prompted, specify the Permissions password, and then click OK. Recover PDF password in case you forgot it.Every coin has two sides. Even the PDF document is strongly encrypted with passwords, it is impossible to insure that it is secure. Once you forgot PDF password, the data in the encrypted PDF file are on the risk of unavailability. Unless fortunately the password knocks your memory again, you got the data lost or you have to give up the document eventually. With the ever-growing of strong encryption algorithms, decryption algorithms gradually come into existing, too. Though the cracking is far more difficulty than ever before, it is still of help to those expecting to recover PDF password and access the password protected PDF file. Take PDF Password Unlocker, a popular PDF password recovery software, for example, it has adopted the advanced decryption algorithms to crack 40-bit RC4, 128-bit RC4, 128-bit AES, and 256-bit AES encrypted passwords with 3 attack methods, Dictionary attack, Brute-force attack, and Brute-force with Mask attack
Reference: http://www.passwordunlocker.com/knowledge/pdf-encryption-and-pdf-password-recovery.html

on Apr 30, 2010 | Computers & Internet

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Hi guys.I am a fellow expert.Does anyone know about the compatibility of a PDF file which I can create in relation to Adobe?What I am asking I guess is are all different software brands able to be...


As far as I know most pdf readers can read any pdf files. Exceptions are pdf files wherein some security was installed. I normally use haihaisoft pdf reader for this type of file which can overcome some secured pdf file but not all.

Dec 29, 2010 | Dell Studio Slim PC Desktop

2 Answers

What is acrobat reader?


Adobe Acrobat is a family of computer programs developed by Adobe Systems, designed to view, create, manipulate and manage files in Adobe's

Plug-in from Adobe. It reads documents in PDF format on any platform.


A program from Adobe that lets you capture a document and then view it in its original format and appearance


Adobe has changed the names of the products in the Acrobat family regularly, also splitting-up, joining, or discontinuing products. Between version 3 and 5, Standard and Professional versions were one product simply called Adobe Acrobat.
As of October 2009[update], the current main members of the Adobe Acrobat family are:
64px-adobe_reader.svg.png magnify-clip.pngAdobe Reader 8/9 Icon
  • Adobe Reader 9 (Windows, Mac and Unix)
  • Adobe Acrobat 9 (Windows & Mac only; no Unix version)
    • Adobe Acrobat 9 Standard
    • Adobe Acrobat 9 Pro
    • Adobe Acrobat 9 Pro Extended (includes Adobe Presenter)

The latest version
Version 9.0 Adobe Acrobat 9.0 was released July 2008:[10][11]
  • PDF version 1.7 (and prior) supported. There are Adobe extensions to PDF 1.7 for Acrobat 9.
  • Product Family includes: Acrobat Standard 9 (Windows only), Acrobat Pro 9, Acrobat Pro Extended 9 (Windows only).
  • Pro Extended Version includes Adobe Presenter and the features of Acrobat 3D.
  • The ability to create Acroforms was restored to Acrobat Standard in this release (in versions 6 through 8, Acrobat Professional was required).
  • Enable real-time collaboration of PDFs with synchronized document views and chat.
  • Improved Web Capture for capturing entire web pages or just some parts into PDF.
  • Integration with acrobat.com to enable storage and sharing of PDF files.
  • Personalize a PDF Portfolio with customizable templates for navigation and branding.
  • Compare and highlight the differences between two versions of a PDF document.
  • Insert FLV (Flash) or H.264 video for direct playback in Adobe Acrobat and Adobe Reader.
  • Convert a variety of video formats to FLV for playback in PDF.
  • Create PDF maps by importing geospatial files that retain metadata and coordinates.
  • OCR PDFs (Paper Capture) using ClearScan. Adobe ClearScan technology creates custom Type1-CID fonts to match the visual appearance of a scanned document after optical character recognition (OCR). ClearScan does not replace the fonts with your system fonts or substitute them by Type1-MM (as in Acrobat 8 and earlier versions), but uses these newly created custom fonts. The custom fonts are embedded in the PDF file (this is obviously mandatory). If the OCR does not recognize a word with enough confidence, then the image (bitmap) of the word is shown in the PDF and the text is put above but hidden (same as what is made in "Searchable Image" mode).
  • Adobe Reader 9 drops support for Adobe Reader Extensions 5 and 6 which permit Adobe Reader client software to save changes to filled-in forms in PDFs. Adobe Reader Extensions 6.1 and newer are still supported. Legacy PDFs will still be viewable, however they will open with the warning "This document enables Reader capabilities that are no longer enabled in this Reader version."[12]
  • On March 10, 2009, Adobe Reader 9.1 was released which addresses a number of customer workflow issues and a critical security vulnerability while providing more stability.[13]
  • On May 12, 2009, Adobe Reader 9.1.1 was released which addresses two critical security vulnerabilities.[14]
  • On June 9, 2009, update version 9.1.2 was released which addresses a number of critical security vulnerabilities.[15]
  • On July 31, 2009, update version 9.1.3 was released which addresses a number of critical security vulnerabilities.[16]
  • On October 14, 2009, Adobe Acrobat 9.2 was released (added support for Windows 7 x86/x64 and fixed many security issues).[17]
  • On January 12, 2010, Adobe Reader 9.3 was released which addresses a number of critical security vulnerabilities.[18]
  • On February 16, 2010, Adobe Acrobat 9.3.1 was released which addresses two critical security vulnerabilities.[19]
  • On April 13, 2010, Adobe Acrobat 9.3.2 was released which addresses several critical security vulnerabilities.[20]

Jun 03, 2010 | Adobe Computers & Internet

1 Answer

Can't save Adobe Acrobat 9 fillable forms


Fill in an interactive pdf form After you fill in the form fields, do any of the following:
  • Click the submit form button. Clicking this button sends the form data to a database across the web or over your company intranet.
  • In Acrobat, choose File > Save As, and rename the file to save the form with the data you entered.
  • In Reader, choose File > Save A Copy, and specify a location for the copy. Note: If the form author gave Reader users extended rights, the saved copy will include the entries you made in the form. Otherwise, the saved copy will be blank.
Enable Adobe Acrobat Reader users to save form data Ordinarily, Reader users can’t save filled-in copies of forms that they complete. However, you can extend rights to users of Reader 8 and later so they can do so. In Acrobat Pro and Pro Extended, these rights also include the ability to add comments, use the Typewriter tool, and digitally sign the PDF.
  1. Open a single PDF, or preview a component PDF in a PDF Portfolio.
  2. If you are editing the form, click Close Form Editing in the upper-right corner of the form.
  3. Do one of the following:
    • (Acrobat Pro and Pro Extended) Choose Advanced > Extend Features In Adobe Reader.
    • (Acrobat Standard only) Choose Advanced > Extend Forms Fill-In & Save In Adobe Reader.
    These extended privileges are limited to the current PDF. When you create a different PDF form, you must perform this task again to enable Reader users to save their own filled-in copies of that PDF.
If you don’t want recipients to overwrite the blank form template by saving form data, do not extend rights in the copy you send to them.

Limitations on saving filled-in forms locally

Acrobat Standard, Acrobat Pro, and Acrobat Pro Extended each allow Adobe Reader 8 or later users to fill in and save PDF forms locally. The use of the Reader Extensions capability for local saving of PDF forms (called extended documents) is limited in two ways:
Number of deployed extended documents An Acrobat Standard, Acrobat Pro, or Acrobat Pro Extended customer can send an extended document to an unlimited number of recipients for them to fill in. For example, an Acrobat customer can post an empty form template on a web page that allows users to fill in and save PDF forms locally. An unlimited number of people can access the template. However, the Acrobat customer can collect only 500 responses from the filled-in form. This limitation includes both hardcopy (paper form submission) and electronic representations of the filled-in form.
Number of recipients of the extended document An Acrobat Standard, Acrobat Pro, or Acrobat Pro Extended customer can send an extended document to no more than 500 unique recipients. For example, an Acrobat customer belongs to an organization with 500 people or less. The Acrobat customer can send an unlimited number of copies of the extended document to those 500 recipients and collect unlimited responses from the filled-in form.
Both limitations apply per entity/company, and multiple users in an entity cannot abuse this feature. Obtaining additional licenses to use Acrobat Standard, Acrobat Pro, and Acrobat Pro Extended does not increase the above restrictions. For example, five Acrobat Standard 9 users in a company cannot send out the same extended document to receive and extract data collectively more than 500 times.
Acrobat Standard, Acrobat Pro, and Acrobat Pro Extended include technology that can enable PDF documents with certain features by using a digital credential. This credential is located within the Software (“Key”). You agree not to access, attempt to access, control, disable, remove, distribute the Key for any purpose.



I hope it helps.
Regards

Mar 16, 2010 | HP Computers & Internet

2 Answers

I AM TRYING TO FILL IN AN APPLICATION FORM IN A PDF FILE AND I DON'T GET ANY OPTIONS TO HIGHLIGHT TEXTS. IS IT BECAUSE THE COMPUTER I'M USING DOESN'T HAVE MICROSOFT WORD INSTALLED?


What program did you use to open the PDF? If you opened it with the default program, you probably used Adobe Reader which does not allow you to edit PDFs. You can import PDFs into several Office suites with add-ons. For example, Open Office 3 has a PDF add-on that lets the PDF be opened and modified in Draw and Impress. There are also online PDF editors and some low cost alternatives to Adobe Acrobat is the full program that makes PDFs. PDFill PDF Editor gets some good reviews
http://download.cnet.com/PDFill-PDF-Editor/3000-6675_4-10295757.html
as does www.pdfescape.com/ (an on-line option). Please note that most will put their logo on your document as a footer or somewhere unless you use a paid version.

I hope this helps.

Cindy Wells
(word does the PDF import more easily as I recall (possibly with an add-on) but there are alternatives.)

Feb 19, 2010 | Microsoft Windows Vista Home Premium...

2 Answers

My printer won't print ADOBE files, but prints all word documents


I believe you are misunderstanding what you're "telling" the computer to do. You are telling the computer (I assume in Microsoft Word, but perhaps elsewhere) to generate an electronic document in PDF format. (I believe PDF stands for Portable Document Format)
It uses a printing metaphor because like a paper copy, the PDF file is designed for people to read, not edit the document you have created. Also, some PDF-making software methods involve pretending to be a printer, which allows the user to make a PDF file in any program that would normally only output your work to a printer.
Most people, when wanting to print a PDF document onto paper, open it with Adobe's Acrobat Reader (which is free software) and print the document from there. For sharing a document that you want no changes to, this is a superior option to sending people an MS Word .doc (or .docx) file, which does not have its information "locked" onto virtual pages in the file.

I hope this helped!

Jan 18, 2010 | HP DeskJet F380 All-In-One Printer

1 Answer

Links do not work in Pdf saved file


Don't panic,many people face this problem.You can use a third-party tool,such as advanced word to pdf 5.0,It is good in preserving the formatting.
source:http://www.advancedpdfconverter.com/products/wordtopdf.html

Jan 11, 2010 | Adobe Acrobat Reader 3.0 for PC/Unix/Mac

2 Answers

Unable to create pfd with word 2007 document


That is normal, Word 2007 cannot create PDF documents, it can only save files on PDF but, being PDF non his own format, it will lose document format, and may not display pdf.

To create PDF you need the full version (not the free acrobat reader) of adobe acrobat, or a different adobe software (eg illustrator) that manages PDF.

See

Adobe Acrobat - How To Create Accessible Adobe® PDF Files Booklet

How to Create PDF Files

Jan 03, 2009 | Microsoft Office Professional 2007 Full...

1 Answer

Password in files


Well if you can save the file but are unsure how to store and keep the file on your pc and have it be safe I would recommend something called Folder Lock. I will provide you a link.

Link: http://www.newsoftwares.net/folderlock/

Summary:
  • On-the-fly 256-bit AES encryption (military standard) for data security.
  • Just as Lockers in physical world, different users can create their own Lockers. A single user can create multiple Lockers with different passwords as well. With Folder Lock, you can choose either to encrypt using 256-bit AES on-the-fly encryption or lock files, folders and drives anywhere on your computer. Each Locker can contain your encrypted files as well as your personal list of locked items.

Dec 17, 2008 | Microsoft Windows XP Professional With...

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