Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

When using MD5 one is not interested in reversing the digest in order to get the original value. Instead, one wants to apply the same method as the original and then compare the results to check if they match.

When I read the post I first thought it would be a web application, you are right to alert to the fact that there could be a middle-man in other scenarios, so there isn't much to do but to collect the information that comes from the browser and work with that. Given the wanted level of security, HTTPS should be considered.

I agree to your concerns on security, but in fact neglected the same values for different users, assuming integrity on DB level.
Still, salt won't solve the problem if it always the same, as it would give the same results for equal passwords. So, salt should be used and constructed in such a manner that it is different for each different user, but produces the same result for any given user. And you can do that while working with Digest::MD5.

There is a lot to say about security, and I am far from being an expert.
Thank you for your input.


In reply to Re^3: Encryption and MD5 by olus
in thread Encryption and MD5 by Trihedralguy

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, 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, 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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others making s'mores by the fire in the courtyard of the Monastery: (3)
    As of 2020-10-23 03:06 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      My favourite web site is:












      Results (234 votes). Check out past polls.

      Notices?