If you want any sort of real encryption security, use GPG. But, if you are willing to use a laxer bit of security, you might try experimenting with html keys auth. See client ssl certs.

Also, I do believe there are some javascript routines around that might be able to do some basic encryption like Base64, that might help you at least keep plain readable text out of the network traffic, if you decrypt on the server.

And this isn't Perl, but if you look at Processing.js you can write some easy code to embed your own java decrypter application that would be able to decrypt what comes in and display it in it's own canvas window id of the DOM. But to explain that is too complicated to do in a forum like this. If you can figure it out, good, but otherwise don't ask me how. :-)

I'm not really a human, but I play one on earth.
Old Perl Programmer Haiku ................... flash japh

In reply to Re: Encrypt files on server and then decrypt when user downloads by zentara
in thread Encrypt files on server and then decrypt when user downloads by MPM

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.