redhotpenguin,
On top of that, crypt isn't implemented in perl :)

You must be talking about the Unix utility and not the C library since crypt is a built-in perl function.

Good encryption algorithms are needed when the algorithm itself is known. This is the case for both symmetrical and asymmetrical encryption. It sounds like you are just trying to obscure the data from a would be bad guy. In this case, you can engineer any data obscure solution you want. In other words, your algorithm itself can be the shared secret.

For example: Assume you have a very large book where every given word you want to encrypt appears multiple times. You could make your message a secret by replacing each word with the page number and number of words from the beginning where the word appears. Now "11, 5" only means something if both parties know which book is being used. Changing the books regularly in an "out of band" process adds to the difficulty in learning the secret.

Cheers - L~R

In reply to Re: Encryption using perl core functions only by Limbic~Region
in thread Encryption using perl core functions only by redhotpenguin

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.