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Server God May 27, 2014 at 07:11 pmBypass copy protection in a pdf file
Since January of this year, I finally switched to Linux OS, and specifically to Ubuntu. I am a third-year student majoring in Computer Science and Computer Science. In the third year there is such an interesting subject - circuit design. And there is also information about them laboratory works which we can do at home and send to the teacher by e-mail. Since the teacher can use the old Microsoft version Office, but I work in LibreOffice, errors may occur when opening odt on Microsoft Office, or when saving doc\docx in LibreOffice. I decided to save the work as a pdf file and send it to the teacher. In addition, he posts completed laboratory works on his website so that any student can familiarize himself with other works. Unfortunately, I have a negative trait - I don’t like people copying my text. I decided to protect the document from copying; I more precisely set a ban on copying and set a password.
In order to make sure that the document was properly created and protected from copying, I tried opening it in standard program view the pdf that is installed in Ubuntu - namely Evince. What a surprise I was when I discovered that the text could be easily copied. “Well, I saved it wrong,” I thought, and did the same steps again. I opened it a second time and again the text was easily copied.
Well, I was quite surprised and decided to send this pdf file to a friend. He said that he could not copy the text in any Foxit Reader, nor in Adobe Reader.
Well, the next completely logical step on my part - I asked him to download Evince. Good product with open source code and cross-platform. There were no problems with installation on Windows OS. My friend opened a protected pdf using a freshly installed Evince and was able to copy the text without any problems.
Conclusion: to bypass protection from copy pdf you can use the Evince program. This option is the most optimal and does not require any additional actions and is the most convenient option. In my opinion, of course.
I didn’t stop there, because perhaps the problem is in LibreOffice itself, you might think. I downloaded the trial Adobe Acrobat Pro and created a pdf file there and protected it with a password.
I got similar results, Evince did the job without any problems.
Tags: pdf, Evince
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1. Introduction
Most people will probably agree that there is confidential information, which you want to protect as much as possible from prying eyes. It just so happens that the majority electronic documents presented in pdf format. How can they be protected? With this article you will learn several ways to Howprotect pdf file, and another option will also be offered pdf file protection.
2. Ways to protect a pdf file
So, protect pdf file You can set a password to open it. This method is described in detail in the article: How to put a password on a pdf document? and Creating pdf files using PDF24 Creator.
note that in the above articles, a password is set when creating a pdf file.
3. New way pdf file protection
The methods proposed above imply pdf file protection when creating it. (How to create a pdf file was discussed in the articles: Creating pdf files using doPDF 7, PDFCreator - creating pdf and How to create a pdf file?) But what if you don’t need to create anything, because you already have a ready-made pdf file and you just need to protect it? This will be discussed in this article.
For this task we will use the utility Vinsoft LockPDF. First you need to download and install Vinsoft LockPDF. After installation Vinsoft LockPDF the main window will open:
If appearance Vinsoft LockPDF If you don't like it, you can go to settings and change it.
Vinsoft LockPDFprotects pdf file from copying content to the clipboard, editing it, converting it and printing it. (How to convert is written in the article: How to convert pdf files and Wondershare PDF to Word Converter - PDF file converter).
4. Set up protection using Vinsoft LockPDF
Protect pdf by using Vinsoft LockPDF very simple. In the field “Select the PDF file to be closed” we indicate the file that we are protecting, and in the field “Select the directory where the file will be saved” - the place where Vinsoft LockPDF will create protected pdf file.
note, if the save directory of a protected file matches the source file, it will be overwritten and become protected. If a different directory is specified, then it will be created protected pdf file, and the source file will remain in original condition.
Screenshot:
Now click “Close PDF file”. In a few seconds everything will be ready. Vinsoft LockPDF will report:
So we protected pdf file.
5. Checking the installed protection
Now let's check how this protection works. First, let's open our protected file, for example, using PDF-XChange Viewer.
The screenshot shows that after the file name there is the word PROTECTED in parentheses. Let's try to print it:
So, the protection does not allow the file to be printed. What about exporting it to other formats?
The “Export/To image” option is also not active, which indicates that the protection we installed is working. The same situation will happen if we open protected pdf file using another program, for example, Adobe Reader 10 PORTABLE.
6. Removing protection...
And yet the protection we have installed can be removed. How to do it? Follow step by step instructions in the articles: Removing protection from pdf files using the PDF UNLOCKER utility and Advanced PDF Password Remover - removing protection from pdf files. Don’t be upset that we removed the protection of our pdf file quite quickly and simply. Not every computer user can remove protection from a pdf file. Installed protection serves as a good reminder of the confidentiality of your document and will do the job in most cases!
We all quite often use documents in PDF format. This is due to its functionality and convenience. However, each of us may encounter the need to remove protection from a PDF file. This may be needed for various reasons, for example, to print text, edit a file, open it in a non-standard way via Photoshop, convert from of this format in another to allow the file to be read by another device, and so on.
The reason for this need is absolutely unimportant. The main thing is that if the PDF file is protected, you will not be able to do all of the above. Therefore, our task today is to find out and understand how not to become a hostage to this situation. So, how do you remove protection from a PDF file? Below I will talk about several ways that allow you to do this. However, all of them can only remove the password from these documents. You won't be able to find out exactly what it was, but after that you can do whatever you want with the file.
If you look for programs that remove protection from PDF files through search engines, the vast majority of them will be paid. But I still managed to find several working methods that did not cost me anything. It is these that I will now share with you, which will save you from the dreary search for a solution.
Online services
Let's start with online services, thanks to which the protection of PDF files can be easily removed. Advantage this method is that you will not need to download software to your HDD, and then install the software with all the ensuing consequences. After all, I’m absolutely sure that you don’t often wonder how to remove protection from a PDF file? As a rule, such a need arises a couple of times in life.
How to do it?
Using your browser, go to www.freemypdf.com. This resource is quite old, but throughout its existence it has proven itself quite well. It not only allows you to remove the password, but also removes restrictions such as protecting PDF files from copying, printing, and the like. However, if your file initially asks for a password even just to open it, then this service will not be able to help you.
So, I’ll tell you how to remove protection from a PDF file using this online service. We go to the site, then click on the file selection button. Next, you need to specify the path to the file that needs to be unlocked. Remember that the size of such a document should not exceed one hundred and fifty megabytes. Otherwise, this method will not help you. When the file is specified, click on the button called "Do it!" We're waiting for a while. After this, you can download the required document without a password and in decrypted form.
Second way
The second way to get rid of your password is www.pdfunlock.com. It works on the same principle as described above. Drag and drop your password-protected document directly into the window of this site. If the file was on your hard drive, click the “My Computer” button. If you find it in, press the button " Google Drive" or "Drop Box". Next, you need to click on the "Unblock" button and wait for the unprotection process to complete.
Free software
Now it's time to learn how to remove protection from a PDF file using free software. Let's start with the first program, which is called "PDF Password Remover Tool". Download it from the developer's website. Just do not confuse this software with a similar one called "PDF Password Remover". Latest program does everything the first one does, but costs twenty-nine US dollars.
How to use?
How to use this miracle? And everything is very simple. Even a schoolchild can understand the interface of this software. We find a field called “Open PDF file”, and in it we indicate the document that needs to be “neutralized”. Next, go to the field called “Save PDF file”, where you need to specify the name under which it will be saved new document no longer protected. Find the "Convert" button and wait for the process to complete. This software is able to cope with many passwords, so, as a rule, there is no need to look for any other solutions to this problem.
Let's move on. I present to your attention the following program that will allow you to unlock a protected document. It's called "Free PDF Unlocker", and you can also download it from the developer's website. It is quite simple and allows you not only to get rid of the password, but also to remove any prohibitions and restrictions on PDF files. This is both print protection and copy protection. The ban on opening files does not present any difficulties for her. She overcomes this obstacle with ease. However, it is not always able to cope with some new documents that have enhanced protection.
Paid software
All of the above is usually enough to remove the password. These methods are quite simple and do not require any material investments. But if for some reason none of the above methods solved your problem, and the PDF document still has a password, try using another program called "Very PDF Password Remover". You can download it, like all previous ones, on the developer’s website.
The full version of this software costs one thousand Russian rubles, however trial version It won't cost you anything. You can easily understand its interface, and it will certainly do everything you need. The program copes with any difficulties that relate to the PDF format.
There is also a sea of similar software, usually paid, which I don’t see the need to use, because, as you can see, there is enough free programs solving the problem that has arisen. If you still decide to use a paid software, then the best of possible options I also suggested it to you.
I will end here, since I told you everything I wanted. All of the above methods definitely work, since I have personally tested them more than once. I hope I saved you from unnecessary waste of time searching for a solution to this pressing problem on Internet resources, as well as thematic forums.
Protect file with password
Once you've downloaded your PDF, you can add a password to it by selecting the "Protect PDF" feature.
To do this, drag the file into the box above or upload from your device or the cloud, then enter New Password to ensure document security.
Protect PDF file with password
Protect PDF files with a password to prevent third parties from copying or printing your documents.
We offer an easy way to protect your PDFs with a password of your choice.
Why protect PDF files?
Password protecting PDF files is useful for a number of reasons. Firstly, only those people to whom you have shared the password will be able to open and view the file.
Secondly, you can set a limit on copying and printing of the PDF document.
File Security and Protection
Setting a password on a PDF document is a delicate task. Of course, you want to know for sure that your files are not in danger.
PDF2Go guarantees the security of all uploaded, edited and converted files. See Privacy Policy for details.
What files can be protected
You can only add a password to Adobe PDF documents. However, the number of pages in a PDF file, as well as the presence of text, images, tables and other objects, does not matter. We are capable of any task.
You can upload other files, text or graphics. We will automatically convert them to PDF format and add passwords for protection.
Complete PDF security
Convenient online studio PDF2Go allows you to protect PDF files with a password absolutely free of charge. But that's not all!
You are not attached to home computer. You can add a password to a PDF file from any available device. This is possible with us.
Printing a secure PDF is impossible without knowledge "Password for changing access rights"(or "Master password"). This is one of the restrictions that this password imposes.
If you don't know Master password and cannot print a protected PDF - you will need a program that will decrypt the PDF file, remove the password and remove all restrictions on actions with the file.
We, at Passcovery, have created, tested and are proud to offer you such a program - Accent PDF Password Recovery.
AccentPPR instantly removes Master password from any PDF file and removes all restrictions from it. AccentPPR also restores at very high speed "Password to open document"(or "User Password").
How to Unblock Printing of Secure PDF
You are just a few steps away from being able to print any secure PDF document:
Step 1: Download and install AccentPPR. The program distribution is digitally signed by our company and does not contain any viruses or hidden activity:
Step 2: Launch PPR and select a protected PDF document. The program will find out what protection is installed in the document and if it detects "Master password", it will offer to decrypt the document, remove the password and remove all restrictions:
Step 3. Save the decrypted PDF document. Just specify the folder on your computer where AccentPPR will save the decrypted PDF file without password protection:
Step 4: Print the previously secured PDF. The program will report the successful saving of the decrypted PDF file and display a link to it. Click on it and the PDF document will open in Adobe Acrobat. Print PDF - there is no more security in it!
PDF password protection
Adobe PDF uses two types of password protection to protect data:
- Password for opening the document (User Password). This password completely blocks access to the PDF document. Not knowing User password The document cannot be opened. AccentPPR offers three types of attacks against a given password.
- Password for changing access rights (Master Password). The password limits the actions that can be performed on the PDF document. It can be opened and read, but prohibited actions such as printing a secure PDF cannot be performed. AccentPPR instantly removes Master password of any complexity.
Benefits of Accent PDF Password Recovery
- Full support for PDF documents created in Acrobat 1.0 - Acrobat XI
- instant removal Password for changing access rights
- the most high speed recovery Password to open PDF document on CPU
- various tricks to save time searching for a password
- easy-to-use solution, ready to use immediately after installation
VIDEO: Quick PDF password recovery with AccentPPR
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