Welcome to WebmasterWorld Guest from

Forum Moderators: coopster & jatar k

Message Too Old, No Replies

Help: encryption/decryption via PHP

keep sensitive files encrypted and decrypt for download.

12:01 am on Aug 2, 2002 (gmt 0)

Junior Member

10+ Year Member

joined:May 2, 2002
votes: 0

Here's what I have:
Upload a file via HTTP to my server
Encrypt it
User request file, decrypt it.
Download file

I don't want to have to decrypt, then download.
Is there some way to encrypt the file so that it can be decrypted as downloaded?
Something like:

readfile (exec(some-decryption-command));

I really don't know, in fact, I'm not sure if I can explain correctly what I want! :)
Do I?
My server is OpenBSD 3.0 and PHP 4.0.6

7:23 am on Aug 5, 2002 (gmt 0)

Senior Member

WebmasterWorld Senior Member drdoc is a WebmasterWorld Top Contributor of All Time 10+ Year Member

joined:Mar 15, 2002
votes: 0

As with any built-in encryption, there really is no way you can decrypt ..
So, the solution would have to be creating your own encryption algorithm .. which in this case is pointless anyway.

May I suggest two alternative solutions?

1) When the file is uploaded it will be placed in a directory that is not accessible through the browser .. meaning, the file would have to be downloaded using your PHP script.

2) When the file is uploaded its contents will be read and placed in a database (depending on file size). When the user requests the file its contents are fetched from the database.


Join The Conversation

Moderators and Top Contributors

Hot Threads This Week

Featured Threads

Free SEO Tools

Hire Expert Members