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I object - my response was related to retrieving the password where the necessary copyright permissions were held.<br />

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I object - my response was related to retrieving the password where the necessary copyright permissions were held.


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And in any case under us law there is provision for 'fair use' under the dmca which this would seem to fall under
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And in any case under us law there is provision for 'fair use' under the dmca which this would seem to fall under

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I have an encrypted PDF file that I can use on any PC by plugging in a username and password. Every time I open the file in Adobe Reader it asks for credentials, it connects to a server, checks those credentials and opens the 600 page PDf file for viewing.<br />
<br />
It alows me to print it to a paper printer, but not to a PDf distiller. I would like to convert this file to a regular PDF and rmeove the limitations. (FYI, I have purchased PDF textbook and I'm not breaking any law by accessing the content. The encryption / authentication system however doesn't work on all devices. This encrypted PDF shows up as 600 blank pages on my iPad and my Android phone).<br />
<br />
How can I decrypt / convert the file? I am working on a Windows 7 workstation<br />
<br />
Thanks <br />
<a href="https://filedb.experts-exchange.com/incoming/2011/10_w42/512031/PDF-encrypt-1.JPG" target="_blank" title="img 1 (92 KB)"><img alt="img 1" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2011/10_w42/800_512031/PDF-encrypt-1.JPG" /></a> <a href="https://filedb.experts-exchange.com/incoming/2011/10_w42/512033/PDF-encrypt-2.JPG" target="_blank" title="img 2 (94 KB)"><img alt="img 2" class="file-block lazyload" style="max-width: 691px;" data-src="https://filedb.experts-exchange.com/incoming/2011/10_w42/512033/PDF-encrypt-2.JPG" /></a>
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PDF-encrypt-2.JPG

PDF-encrypt-1.JPG

I have an encrypted PDF file that I can use on any PC by plugging in a username and password. Every time I open the file in Adobe Reader it asks for credentials, it connects to a server, checks those credentials and opens the 600 page PDf file for viewing.

It alows me to print it to a paper printer, but not to a PDf distiller. I would like to convert this file to a regular PDF and rmeove the limitations. (FYI, I have purchased PDF textbook and I'm not breaking any law by accessing the content. The encryption / authentication system however doesn't work on all devices. This encrypted PDF shows up as 600 blank pages on my iPad and my Android phone).

How can I decrypt / convert the file? I am working on a Windows 7 workstation

Thanks 

 

how to decrypt a PDF

Adobe Acrobat is a family of application software and Web services developed by Adobe Systems to view, create, manipulate, print and manage files in Portable Document Format (PDF). The family comprises Acrobat Reader (formerly Adobe Reader), Acrobat (formerly Acrobat Exchange) and Acrobat.com. The commercial proprietary Acrobat, available for Microsoft Windows and OS X only, can also create, edit, convert, digitally sign, encrypt, export and publish PDF files.

Adobe Acrobat

Encryption is the process of encoding messages or information in such a way that only authorized parties can read it. In an encryption scheme, the intended communication information or message, referred to as plaintext, is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients, but not to unauthorized interceptors.

Encryption

A printer is a peripheral which makes a persistent human readable representation of graphics or text on paper or similar physical media. Traditional printers are being used more for special purposes, like printing photographs or artwork, and are no longer a must-have peripheral; 3D printing has become an area of intense interest, allowing the creation of physical objects. An image scanner is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. Hand-held scanners, where the device is moved by hand, have evolved from text scanning "wands" to 3D scanners used for industrial design, reverse engineering, test and measurement, orthotics, gaming and other applications.