How to Copy Protect a File? at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Open DV Discussion
For topics which don't fit into any of the other categories.


Reply
 
Thread Tools Search this Thread
Old September 15th, 2014, 01:14 PM   #1
Trustee
 
Join Date: Nov 2006
Location: Honolulu, HI
Posts: 1,430
How to Copy Protect a File?

Is there a way to allow a video file to be moved, but not allowed to be duplicated or copied? How is this done? For example, if I had a video file on a usb thumbdrive for a client, but I don't want him to copy and distribute it. Cut and pasting it to another drive is ok as long as it's moved without duplicating it?
Warren Kawamoto is offline   Reply With Quote
Old September 16th, 2014, 02:43 AM   #2
Inner Circle
 
Join Date: Feb 2009
Location: Brisbane, Australia
Posts: 2,261
Re: How to Copy Protect a File?

No.

Andrew
Andrew Smith is offline   Reply With Quote
Old September 19th, 2014, 01:24 PM   #3
Inner Circle
 
Join Date: Feb 2007
Location: Tucson AZ
Posts: 2,207
Re: How to Copy Protect a File?

Well you could encrypt it but then nobody could view it. Fundamentally if you can see it on a computer you can get hold of it on a computer.
Jim Andrada is offline   Reply With Quote
Old September 21st, 2014, 11:40 AM   #4
Trustee
 
Join Date: Nov 2006
Location: Honolulu, HI
Posts: 1,430
Re: How to Copy Protect a File?

I right click on the file, properties/security/edit, then deny full control except "read." This prevents copying and altering the file. However, I can't move the file around, which is what I wanted to do. For now, I can put a file onto a flashdrive, then lock it with the steps above. Client would then have to insert the flashdrive to their device and play it only from the flashdrive.
Warren Kawamoto is offline   Reply With Quote
Old September 21st, 2014, 04:04 PM   #5
Major Player
 
Join Date: Dec 2005
Posts: 848
Re: How to Copy Protect a File?

Anyone can copy the flash drive contents to other media. Those attributes are easily changed on writable media. As for using javascript on web interfaces it's easy to examine the code and determine where the file is and download it.

In general, rather than try to prevent copying it's better to eliminate the motivation for doing so and that's usually related to a change in the underlying business model. E.g. make compensation a attribute of the service rather than the end product.

Streaming might be an option but you're probably better off using a third party provider rather than trying to roll your own.
Jim Michael is offline   Reply With Quote
Old September 24th, 2014, 10:11 PM   #6
Inner Circle
 
Join Date: Feb 2007
Location: Tucson AZ
Posts: 2,207
Re: How to Copy Protect a File?

+1 for what Jim said - if you can read it you can copy it. All it takes to copy something is read, write, read, write,...
Jim Andrada is offline   Reply With Quote
Old September 25th, 2014, 01:55 AM   #7
Regular Crew
 
Join Date: Jan 2012
Location: Newton Abbot Devon
Posts: 46
Re: How to Copy Protect a File?

Something that I have never tried but in theory "Might" work on a DVD! At the end of a video sequence, include say 15 min of "Black" When you make the DVD put a small scratch on the outermost part of the recorded data, where the "Black" is! If you then try to copy it the software reading will report that it can`t read all the data & will therefore refuse to copy it, however, the DVD will still play in the normal way!
Thoughts anyone?
Barry Hunter is offline   Reply With Quote
Old September 25th, 2014, 02:20 AM   #8
Inner Circle
 
Join Date: Nov 2005
Location: LOWESTOFT - UK
Posts: 2,125
Re: How to Copy Protect a File?

Now that is a great idea! Only copiers and complete file readers would get annoyed, and it would as you say play in an ordinary player. Clever!
Paul R Johnson is offline   Reply With Quote
Old September 27th, 2014, 02:34 PM   #9
Inner Circle
 
Join Date: Feb 2007
Location: Tucson AZ
Posts: 2,207
Re: How to Copy Protect a File?

Well, block by block read/write would still copy it. And the OP was referring to a Thumb drive as opposed to a DVD.

Regardless, short of encryption, there's no way to prevent someone who badly enough wants to copy something from doing so.
Jim Andrada is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 09:56 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network