RE: [PHP] How to prevent people from downloading images
Well- The best form of protection against this that I have seen is on Microsoft's satellite imaging server (can't remember the name off hand, if someone else can, post it please!) Basically it uses Java to display a satellite snapshot and it's broken in pieces (so it's easy to navigate west or north or whatever). At any rate, you cannot screencapture it or print screen it and even higher-end screen capture software does not seem to be able to grab the images (also, if anyone can FIND software that will, post it here too?!). The server is TerraSearch or something... can't recall off the top of my head. Jesse Williams Systems Administrator DowNET VoIP Team Electronic Data Systems, Inc. (EDS) -Original Message- From: rodrigo [mailto:[EMAIL PROTECTED]] Sent: Tuesday, July 03, 2001 8:37 PM To: php php Subject: [PHP] How to prevent people from downloading images This is probably more of a client side programming issue rather than something that has to do with PHP. But I figure that some of you might have something meaningful to comment. I need a way to prevent the download of some images in a web page. I also require that these images be presented within the web page. That is, I don' want them to be displayed in another window. They should remain embedded in the web page along with the rest of the page elements. Thanks in advance. -- Ivan R. Quintero E.* (507)228-3477 Aptdo 1263 * (507)228-9105 Balboa, Ancon * 612-1103 Republic of Panama * -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
RE: [PHP] How to prevent people from downloading images
On Wed, 04 Jul 2001, ..s.c.o.t.t.. wrote: there are two answers to this: 1) it cannot be done. as long as that image is on the person's computer screen, it is physically impossible to prevent that person from saving the image and using it. (a simple tap of the print screen will take a screenshot on windows machines, as someone else mentioned) Agreed, but how about only showing a very small image. Large enough for them to know what it is, but not large enough that saving it would do them much good. -- John Meyer [EMAIL PROTECTED] Programmer Those who sacrifice liberty for security deserve neither -- Ben Franklin -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] How to prevent people from downloading images
At http://www.floatographs.com , I reduce the resolution and put a watermark in the JPEG. Not very clever, but it works. Todd P.S. The site is using PHP and Interbase plus a lot of help from all of you folks!! Many thanks -- Todd Cary Ariste Software [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP] How to prevent people from downloading images
This is probably more of a client side programming issue rather than something that has to do with PHP. But I figure that some of you might have something meaningful to comment. I need a way to prevent the download of some images in a web page. I also require that these images be presented within the web page. That is, I don' want them to be displayed in another window. They should remain embedded in the web page along with the rest of the page elements. Thanks in advance. -- Ivan R. Quintero E.* (507)228-3477 Aptdo 1263 * (507)228-9105 Balboa, Ancon * 612-1103 Republic of Panama * -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
RE: [PHP] How to prevent people from downloading images
I don't remember exactly the code on how to do it, but you have have the images placed in a folder outside the server's public document tree (like you would do with includes) ... that way, I couldn't link directly to your pic. As for stopping someone from right clicking on the image and doing a save as, I'm not sure if its possible, although I would love to hear if someone has come up with a way. --Mark. -Original Message- From: rodrigo [mailto:[EMAIL PROTECTED]] Sent: Tuesday, July 03, 2001 5:37 PM To: php php Subject: [PHP] How to prevent people from downloading images This is probably more of a client side programming issue rather than something that has to do with PHP. But I figure that some of you might have something meaningful to comment. I need a way to prevent the download of some images in a web page. I also require that these images be presented within the web page. That is, I don' want them to be displayed in another window. They should remain embedded in the web page along with the rest of the page elements. Thanks in advance. -- Ivan R. Quintero E.* (507)228-3477 Aptdo 1263 * (507)228-9105 Balboa, Ancon * 612-1103 Republic of Panama * -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] How to prevent people from downloading images
on 7/3/01 6:36 PM, rodrigo at [EMAIL PROTECTED] wrote: This is probably more of a client side programming issue rather than something that has to do with PHP. But I figure that some of you might have something meaningful to comment. I need a way to prevent the download of some images in a web page. I also require that these images be presented within the web page. That is, I don' want them to be displayed in another window. They should remain embedded in the web page along with the rest of the page elements. as in you don't want people to steal them? the image has to be passed to the browser, so it's gonna be tough. you may be able to pull it off in specific browsers, but you can't stop someone from writing their own 'browser' that copies the file to disk as it receives the image. i've got a friend that does system work for a place that has artist portfolio's online so folks can browse images and then purchase the rights to use them. they've had some problems with folks not paying (imagine that). they've written a perl program to snoop thru logs and try to track down folks stealing^w using images without paying for them. it's a fairly involved process and definitely isn't exact. anyone else? mike Thanks in advance. -- mike cullerton -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
RE: [PHP] How to prevent people from downloading images
yeah use macromedia's flash is One way there is a java script way ... but i think that basically just stops people right clicking the page -Original Message- From: rodrigo [mailto:[EMAIL PROTECTED]] Sent: Wednesday, July 04, 2001 10:37 AM To: php php Subject: [PHP] How to prevent people from downloading images This is probably more of a client side programming issue rather than something that has to do with PHP. But I figure that some of you might have something meaningful to comment. I need a way to prevent the download of some images in a web page. I also require that these images be presented within the web page. That is, I don' want them to be displayed in another window. They should remain embedded in the web page along with the rest of the page elements. Thanks in advance. -- Ivan R. Quintero E.* (507)228-3477 Aptdo 1263 * (507)228-9105 Balboa, Ancon * 612-1103 Republic of Panama * -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] How to prevent people from downloading images
I bought (it was something like $5-10) a java class called imageProtect from Liquid Cool Research (their new page is http://www.liquidcoolresearch.com/) a long time ago and I just checked on their site -- it doesn't seem to be on sale any more. It worked for me (basically it was just java loading and displaying the image but it did a bit more if I recall -- like the ability to add watermarks, copyright info, etc.) Aral :) __ ([EMAIL PROTECTED]) New Media Producer, Kismia, Inc. ([EMAIL PROTECTED]) Adj. Prof., American University ¯¯ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] How to prevent people from downloading images
rodrigo [EMAIL PROTECTED] writes: I need a way to prevent the download of some images in a web page. I also require that these images be presented within the web page. That is, I don' want them to be displayed in another window. They should remain embedded in the web page along with the rest of the page elements. I've seen a neat way of ``protecting'' images from download: cut them up in, say, ten pieces, and display them in a table where each cell contains a piece. While this does not really protect the images from download, one would have to do a certain amount of work to construct an image from the pieces. Come to think of it, the easiest way would be to take a screenshot of the browser window, and just cut the image out. I don't think anything at all would protect you from people doing something like this. -- Arcady Genkin i=1; while 1, hilb(i); i=i+1; end -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] How to prevent people from downloading images
On Tue, 03 Jul 2001, [EMAIL PROTECTED] wrote: rodrigo [EMAIL PROTECTED] writes: I need a way to prevent the download of some images in a web page. I also require that these images be presented within the web page. That is, I don' want them to be displayed in another window. They should remain embedded in the web page along with the rest of the page elements. I've seen a neat trick in ASP (*boo* *hiss*) where you could take the image, and binary write it out to the web page as the src. Could that be done here? Or another trick might be to show them a low res version of the graphic, then require payment before you give the the high res one. --- John Meyer [EMAIL PROTECTED] Programmer Those who sacrifice liberty for security deserve neither -- Ben Franklin -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
RE: [PHP] How to prevent people from downloading images
there are two answers to this: 1) it cannot be done. as long as that image is on the person's computer screen, it is physically impossible to prevent that person from saving the image and using it. (a simple tap of the print screen will take a screenshot on windows machines, as someone else mentioned) 2) if you used java or some form of server-side script to pass the binary data directly to the browser, it would make it much harder for the average websurfur to steal the image, since he/she wouldnt be able to just right-click on it and select save as... (as someone also mentioned, he bought a java class that did this) but like i said before, if that image is viewable on the computer monitor, it's impossible to protect it if someone wants to steal it bad enough. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] How to prevent people from downloading images
if that image is viewable on the computer monitor, it's impossible to protect it if someone wants to steal it bad enough. True, and I have friends who are professional photographers who actually *don't* want to protect their images in this way. It is much more profitable to be able to log who is stealing your images and then sue them. :) Aral __ ([EMAIL PROTECTED]) New Media Producer, Kismia, Inc. ([EMAIL PROTECTED]) Adj. Prof., American University ¯¯ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] How to prevent people from downloading images
There is only one way to prevent people from steeling images, and that is to print a logo all over the image: http://www.agefotostock.com/age/sueco/enim01.asp?foto=29580light= If you write a javascript that disables the right mouse button, I'ld be able to steel it anyway cause I'm a Mac user and we don't have right buttons =) Or if you printed it as a binary I'ld still be able to take a screendump using Cmd (applekey) + Shift + 3 =) Sincerely, Victor -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
