I'd probably do something like in (tye)Re: Portably transforming a string to a valid filename to transform each file name into a string that only uses 64 common characters ('0'..'9','a'..'z','A'..'Z','.', and '_'), treat that like a base-64 encoded value and unencode it to get a binary string, encrypt that string, base-64 encode that and use the result as the file name. (Note that I said "like" as that node creates file names taken from a set of 65 characters.)

The file name will remain the same size (if it doesn't use any unusual characters) or increase slightly in size (if it does) and you can use any general-purpose encryption you like.

        - tye (but my friends call me "Tye")

In reply to (tye)Re: Encrypting a Filename by tye
in thread Encrypting a Filename by John M. Dlugosz

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.