I think that when the enemy has root access you are severely violated. One step back would be fisical access of a enemy to hardware, but I think that there are no step forward. The root access is the deepest violation possible in a energized system.

Your thoughts are possible to be deployed, but are useless because the information to be protected could be intercepted before it be encrypted.

Maybe the backups would be protected that way, but almost useless too because, with the backup copies, an attacker may have enough information to prepare a more sofisticated attack.

The assimetrical keys are useful to try avoid changes in the message thru the network. I heard about the possibility of a man in the middle be able to decrypt a message, so there are high risks in a encrypted transmition if the internal network are compromised.

IHO, security is about the weakest link in a chain, there are no shortcuts at all. You must, first at all, to protect your permission system and the backups, these are the natural weakest links.

In reply to Re: Effective database column level encryption? by cragapito
in thread Effective database column level encryption? by maruhige

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.