I absolutely, 100% guarantee NOT. As long as I can view your image, I can use a screen capture utility to capture the bitmapped version from my video cards RAM. That drops the quality of my resolution down to 72 dpi, but that's still perfectly usable except for blowing up more then 3X.
Can you make it difficult for someone? Certainly. EG: have all the urls be returned by a cgi URL. Part of the form's get request is a random or some other identifier. Step 1: Give user a link to the page of images. Step 2: When the user goes to download the page, the page sets up each image src url like this <img src="/images/getimage?imagename=image1&key=eDFtsd5679fs43> <img src="/images/getimage?imagename=image2&key=dugnr73mg833ld> And for each of theys keys, it puts a record in that database, saying that key has not been used yet. Step 3: When the browser downloads the page of images, it then of course downloads each image, by calling getimage, and the getimage script, checks the database. If the key is not used yet, it sets the recordkey to used, and then returns the image itself using Content-type header. If the key was used, it returns an error (or nothing, or an image that is a picture of "Invalid request" or such). That way, if the user tries to right click on the image and say "save to local hard drive" the second download will fail! Is this bullet proof? Absolutely not! In certain browsers (eg lynx) I can disable downloading of images, and then I can use a browser (or lynx) to download the image SOURCE and save directly to my hard drive. You can keep the simple people out, but you cannot beat the smart ones, I guarantee it. If you find a method that you think will keep people from getting your images, let me know, I'll be happy to test it for you... :) Terry Fielder Network Engineer Great Gulf Homes / Ashton Woods Homes [EMAIL PROTECTED] > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On > Behalf Of Graham Faulkner > Sent: Monday, April 15, 2002 4:05 PM > To: [EMAIL PROTECTED] > Subject: [CFTALKTor] non-downloadable content > > > Here's something posed to me by a client: > > "Is it possible to mount certain photos on a web page in a > way that they > cannot be copied or downloaded from that page but only viewed?" > > Any suggestions? Can this be applied to other content types? > > Blessings, > > Graham > > ------------------------------------------------------------ > Graham Faulkner, BBA > President > Global Audience Communications > > Web design with YOUR world in mind! > > Web: http://www.GlobalAudienceCommunications.com > Email: [EMAIL PROTECTED] > > Tel./Fax: 519-880-9184 > Cell: 519-496-0887 > > - > You are subscribed to the CFUGToronto CFTALK ListSRV. > This message has been posted by: "Graham Faulkner" > <[EMAIL PROTECTED]> > To Unsubscribe, Please Visit and Login to http://www.CFUGToronto.org/ > Manager: Kevin Towes ([EMAIL PROTECTED]) > http://www.CFUGToronto.org/ > This System has been donated by Infopreneur, Inc. > (http://www.infopreneur.net) > - You are subscribed to the CFUGToronto CFTALK ListSRV. This message has been posted by: [EMAIL PROTECTED] To Unsubscribe, Please Visit and Login to http://www.CFUGToronto.org/ Manager: Kevin Towes ([EMAIL PROTECTED]) http://www.CFUGToronto.org/ This System has been donated by Infopreneur, Inc. (http://www.infopreneur.net)
