MD5 is a hash function (Message Digest 5 is used as a one-way crypto function)
You usually use it this way:
1)you store the hashed/encrypted password/signature.
2)then when someone want to authenticate he types a pass/sig, you encrypt it with MD5 and check the value produced to the one stored : if it's a match it's the right passwd.

MD5 has nothing to deal with public crypto (see rather RSA, Diffie-Hellman, ElGamal...)
So I guess to properly check those people signature, you should rather decrypt the sig (encrypted with their private key) with their public key to ensure it decrypt into something meaningful...


"Trying to be a SMART lamer" (thanx to Merlyn ;-)

In reply to Re: MD5 Signature checking by arhuman
in thread MD5 Signature checking by tame1

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.