📄 des-56.htm
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<td width="100%" bgcolor="#FFD940"><font color="#0000FF" size="4" face="Verdana"><strong>DES-56
Encryption Library 1.01</strong></font></td>
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<p><font color="#000000" size="2" face="Verdana">This library will encrypt information
using the old DES-56 block cipher algorithm, proposed as a standard by the U.S. Government
to store sensitive information.</font></p>
<p><font color="#000000" size="2" face="Verdana">The implementation of this algorithm has
been done based on the description written by <a
href="mailto:mfischer@heinous.music.uiowa.edu">Matthew Fischer</a>, <a
href="ftp://scss3.cl.msu.edu/pub/crypt/docs/des-algorithm-details.txt">How to implement
the Data Encryption Standard (DES)</a>. Also thanks to <a
href="mailto:averyt@ix.netcom.com">Kelton Blair Averyt</a> for his collaboration.</font></p>
<p><font color="#000000" size="2" face="Verdana">In this library I have also included the <a
href="Base64.htm">Base64 encoding library</a>, that you can use to export the encrypted
information. In the ZIP file there is also a short example on how to use both objects
together.</font></p>
<p><font color="#000000" size="2" face="Verdana">Fore more information on the DES
algorithm, please check </font><a href="http://www.rsa.com/rsalabs/newfaq/q64.html"><font
size="2" face="Verdana">Question 64. What is DES?</font></a><font color="#000000" size="2"
face="Verdana"> and <a href="http://www.rsa.com/rsalabs/newfaq/q68.html">Question 68. Can
DES be exported from the United States?</a> from the <a
href="http://www.rsa.com/rsalabs/newfaq/">RSA Labs FAQ</a>.</font></p>
<p><font size="2" face="Verdana"><u>Properties:</u></font>
<ul>
<li><font size="2" face="Verdana">Key. String that will be used as the key to encrypt and
decrypt. The key used in this algorithm is limited to 56 bits, taken out from a 64 bits
string. That means that if you specify a password of more than 8 characters, only the
first eight will be taken for the password.</font></li>
</ul>
<p><font color="#000000" size="2" face="Verdana"><u>Methods:</u></font>
<ul>
<li><font size="2" face="Verdana">Decrypt (sText As String) As String. This will decrypt the
information given in sText.</font></li>
<li><font size="2" face="Verdana">Encrypt (sText As String) As String. This will encrypt the
string given in sText.</font></li>
</ul>
<p><font size="2" face="Verdana"><u>History:</u></font>
<ul>
<li><font size="2" face="Verdana">28.05.98, version 1.0 released.</font></li>
<li><font size="2" face="Verdana">11.06.98, version 1.01: solved problems ocurred when
trying to decrypt not valid (or encrypted) data.</font></li>
</ul>
<p><font size="2" face="Verdana"> </font></p>
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