| 1 |
11 |
root |
<!--# set var="title" value="DES Core" -->
|
| 2 |
|
|
<!--# include virtual="/ssi/ssi_start.shtml" -->
|
| 3 |
|
|
<b><font face="Helvetica, Arial"><font color="#BF0000"><font size=+2>Project
|
| 4 |
|
|
Name: DES Core</font></font></font></b>
|
| 5 |
|
|
<p>(See change Log at bottom of page for changes/updates)
|
| 6 |
|
|
<h3><u><font size=+1>Description:</font></u> </h3>
|
| 7 |
|
|
<p>Simple DES core. </p>
|
| 8 |
|
|
<p> </p>
|
| 9 |
|
|
<h3><u><font size=+1>Motivation</font></u> </h3>
|
| 10 |
|
|
<ul>
|
| 11 |
|
|
<li> A simple DES core</li>
|
| 12 |
|
|
<li> Fast and Small Version</li>
|
| 13 |
|
|
<li> Open Source</li>
|
| 14 |
|
|
</ul>
|
| 15 |
|
|
<p> </p>
|
| 16 |
|
|
<h3><u><font size=+1>Compatibility</font></u> </h3>
|
| 17 |
|
|
<p>I believe that the core complies to NIST-800-17. However, there has
|
| 18 |
|
|
been no formal third party verification.
|
| 19 |
|
|
<p>The official NIST specification can be downloaded here: <a href="http://csrc.nist.gov/nistpubs/800-17.pdf">800-17.pdf</a>
|
| 20 |
|
|
<p>
|
| 21 |
|
|
<h3><u><font size=+1>Performance</font></u> </h3>
|
| 22 |
|
|
<p> Two implementations are provided:
|
| 23 |
|
|
<h4>1) Area Optimized </h4>
|
| 24 |
|
|
<p> This is a sequential implementation and needs 16 cycles to complete
|
| 25 |
|
|
a full encryption/decryption cycle. </p>
|
| 26 |
|
|
<ul>
|
| 27 |
|
|
<li>0.18u UMC ASIC process: >155Mhz 3K Gates</li>
|
| 28 |
|
|
<li>Altera APEX 20KE-1: 1106 lcells >27MHz</li>
|
| 29 |
|
|
<li>Altera FLEX 10K50E-1: 1283 lcells >43MHz</li>
|
| 30 |
|
|
</ul>
|
| 31 |
|
|
<h4>2) Performance Optimized </h4>
|
| 32 |
|
|
<p>This is a pipelined implementation that has a 16 cycle pipeline (plus 1 input
|
| 33 |
|
|
and 1 output register). It can perform a complete encryption/decryption
|
| 34 |
|
|
every cycle. </p>
|
| 35 |
|
|
<ul>
|
| 36 |
|
|
<li> 0.18u UMC ASIC process: >290Mhz 28K Gates</li>
|
| 37 |
|
|
<li>Altera APEX 20KE-1: 6688 lcells >53MHz</li>
|
| 38 |
|
|
<li>Altera FLEX 10K130E-1: 6485 lcells >76 Mhz</li>
|
| 39 |
|
|
</ul>
|
| 40 |
|
|
<h3><u><font size=+1>Implementing the Core</font></u> </h3>
|
| 41 |
|
|
<p>Nothing special about implementing the core.
|
| 42 |
|
|
<p>
|
| 43 |
|
|
<h3><u><font size=+1>Status</font></u> </h3>
|
| 44 |
|
|
<p>Second Release: Added Encrypt/Decrypt input (Thanks to Mark Cynar for providing
|
| 45 |
|
|
the code); Changed Directory Structure; Improved tetst benches.
|
| 46 |
|
|
<h4> </h4>
|
| 47 |
|
|
<h4><u><font size="+1">Download</font></u></h4>
|
| 48 |
|
|
<p>To get a tared and gziped snapshot from CVS click <a href="http://www.opencores.org/cgi-bin/cvsget.cgi?module=des">here</a>,
|
| 49 |
|
|
or go to the <a href="http://www.opencores.org/cvs.shtml">CVS info page</a>.
|
| 50 |
|
|
<p>
|
| 51 |
|
|
<h3><u><font size=+1>To-Do</font></u> </h3>
|
| 52 |
|
|
<li>
|
| 53 |
|
|
Add a Tripple-DES version</li>
|
| 54 |
|
|
|
| 55 |
|
|
<p>
|
| 56 |
|
|
<h4><u><font size=+1>Author / Maintainer</font></u> </h4>
|
| 57 |
|
|
<p>I have been doing ASIC design, verification and synthesis for over 15
|
| 58 |
|
|
years. I hope you find this cores useful. Please send me a note if you
|
| 59 |
|
|
intend to use it !
|
| 60 |
|
|
<p>Rudolf Usselmann<br>
|
| 61 |
|
|
<a href="mailto:rudi@asics.ws_NOSPAM">rudi@asics.ws_NOSPAM<br>
|
| 62 |
|
|
</a><a href="http://www.asics.ws">www.asics.ws</a>
|
| 63 |
|
|
<p>Feel free to send me comments, suggestions and bug reports.
|
| 64 |
|
|
<p>
|
| 65 |
|
|
<h4><u><font size=+1>Change Log</font></u> </h4>
|
| 66 |
|
|
<p>10/6/2001 RU - Updated Directory Structure, added encrypt/decrypt, improved
|
| 67 |
|
|
test bench
|
| 68 |
|
|
<p>9/14/2000 RU - Initial release <!--# include virtual="/ssi/ssi_end.shtml" -->
|
