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<channel>
	<title>[Be el o ge] &#187; Cryptography</title>
	<atom:link href="http://blog.project-sierra.de/archives/category/cryptography/feed" rel="self" type="application/rss+xml" />
	<link>http://blog.project-sierra.de</link>
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			<item>
		<title>Shuffle Algorithm</title>
		<link>http://blog.project-sierra.de/archives/538</link>
		<comments>http://blog.project-sierra.de/archives/538#comments</comments>
		<pubDate>Thu, 20 Mar 2008 10:37:16 +0000</pubDate>
		<dc:creator>skarabaeus</dc:creator>
				<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[Programming]]></category>

		<guid isPermaLink="false">http://blog.project-sierra.de/archives/538</guid>
		<description><![CDATA[This is excellent. 
Update
and this is too!
]]></description>
			<content:encoded><![CDATA[<!-- google_ad_section_start --><p><p><a href="http://www.codinghorror.com/blog/archives/001015.html">This is excellent</a>. </p>
<p><strong>Update</strong><br />
<a href="http://szeryf.wordpress.com/2007/06/19/a-simple-shuffle-that-proved-not-so-simple-after-all/">and this is too</a>!</p>
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		</item>
		<item>
		<title>PKCS#10 Zertifikatsantrag mit openssl</title>
		<link>http://blog.project-sierra.de/archives/410</link>
		<comments>http://blog.project-sierra.de/archives/410#comments</comments>
		<pubDate>Mon, 01 Oct 2007 08:08:20 +0000</pubDate>
		<dc:creator>skarabaeus</dc:creator>
				<category><![CDATA[Apache]]></category>
		<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[Security]]></category>

		<guid isPermaLink="false">http://blog.project-sierra.de/archives/410</guid>
		<description><![CDATA[Um z.B. beim Rechenzentrum ein Serverzertifikat für einen Webserver beantragen zu können benötigt man einen PKCS#10 Zertifikatsantrag. Dieser kann mit openssl erstellt werden:

openssl req -newkey rsa:2048 -sha1 -keyout hqe_key.pem -out hqe.pem

]]></description>
			<content:encoded><![CDATA[<!-- google_ad_section_start --><p><p>Um z.B. beim Rechenzentrum ein Serverzertifikat für einen Webserver beantragen zu können benötigt man einen PKCS#10 Zertifikatsantrag. Dieser kann mit <a href="http://www.openssl.org/">openssl</a> erstellt werden:</p>

<div class="wp_syntax"><div class="code"><pre class="bash" style="font-family:monospace;">openssl req <span style="color: #660033;">-newkey</span> rsa:<span style="color: #000000;">2048</span> <span style="color: #660033;">-sha1</span> <span style="color: #660033;">-keyout</span> hqe_key.pem <span style="color: #660033;">-out</span> hqe.pem</pre></div></div>

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		</item>
		<item>
		<title>hexToByte &#8211; update</title>
		<link>http://blog.project-sierra.de/archives/330</link>
		<comments>http://blog.project-sierra.de/archives/330#comments</comments>
		<pubDate>Mon, 30 Apr 2007 19:38:29 +0000</pubDate>
		<dc:creator>skarabaeus</dc:creator>
				<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[Java]]></category>
		<category><![CDATA[Programming]]></category>

		<guid isPermaLink="false">http://blog.project-sierra.de/archives/330</guid>
		<description><![CDATA[Benutzt man BouncyCastle als Security Provider in Java, kann man einfach diese Funktion verwenden.

org.bouncycastle.util.encoders.Hex.decode&#40;hexStr&#41;

]]></description>
			<content:encoded><![CDATA[<!-- google_ad_section_start --><p><p>Benutzt man <a href="org.bouncycastle.util.encoders.Hex">BouncyCastle</a> als Security Provider in Java, kann man einfach diese Funktion verwenden.</p>

<div class="wp_syntax"><div class="code"><pre class="java" style="font-family:monospace;">org.<span style="color: #006633;">bouncycastle</span>.<span style="color: #006633;">util</span>.<span style="color: #006633;">encoders</span>.<span style="color: #006633;">Hex</span>.<span style="color: #006633;">decode</span><span style="color: #009900;">&#40;</span>hexStr<span style="color: #009900;">&#41;</span></pre></div></div>

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		<item>
		<title>new gpg key</title>
		<link>http://blog.project-sierra.de/archives/292</link>
		<comments>http://blog.project-sierra.de/archives/292#comments</comments>
		<pubDate>Sun, 24 Dec 2006 15:33:24 +0000</pubDate>
		<dc:creator>skarabaeus</dc:creator>
				<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[Security]]></category>

		<guid isPermaLink="false">http://blog.project-sierra.de/archives/292</guid>
		<description><![CDATA[The old key for skarabaeus (at) project &#8211; sierra . de is not valid any more. Here is the new key:
Public Key
Fingerprint: D061 02B2 B71B 204D 5B1D A19B 84AE 0F81 1AC1 8639
]]></description>
			<content:encoded><![CDATA[<!-- google_ad_section_start --><p><p>The old key for <strong>skarabaeus (at) project &#8211; sierra . de</strong> is not valid any more. Here is the new key:</p>
<p><a href="http://www.project-sierra.de/skarabaeus.asc">Public Key</a><br />
Fingerprint: D061 02B2 B71B 204D 5B1D A19B 84AE 0F81 1AC1 8639</p>
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		</item>
		<item>
		<title>He knows Alice and Bobs shared secret</title>
		<link>http://blog.project-sierra.de/archives/279</link>
		<comments>http://blog.project-sierra.de/archives/279#comments</comments>
		<pubDate>Mon, 06 Nov 2006 17:08:04 +0000</pubDate>
		<dc:creator>skarabaeus</dc:creator>
				<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[Fun]]></category>
		<category><![CDATA[Security]]></category>

		<guid isPermaLink="false">http://blog.project-sierra.de/archives/279</guid>
		<description><![CDATA[Bruce Schneier Facts
in Analogie zu: Chuck Norris Facts
Auch gut:
Bruce Schneier knows about the state of schroedinger&#8217;s cat.
]]></description>
			<content:encoded><![CDATA[<!-- google_ad_section_start --><p><p><a href="http://geekz.co.uk/schneierfacts/">Bruce Schneier Facts</a></p>
<p>in Analogie zu: <a href="http://blog.project-sierra.de/archives/192">Chuck Norris Facts</a></p>
<p>Auch gut:<br />
Bruce Schneier knows about the state of <a href="http://de.wikipedia.org/wiki/Schr%C3%B6dingers_Katze">schroedinger&#8217;s cat</a>.</p>
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		<item>
		<title>The Solitaire Encryption Algorithm</title>
		<link>http://blog.project-sierra.de/archives/31</link>
		<comments>http://blog.project-sierra.de/archives/31#comments</comments>
		<pubDate>Fri, 02 Sep 2005 20:59:35 +0000</pubDate>
		<dc:creator>skarabaeus</dc:creator>
				<category><![CDATA[Cryptography]]></category>

		<guid isPermaLink="false">http://blog.project-sierra.de/?p=31</guid>
		<description><![CDATA[Aufmerksam geworden bin ich auf diesen Verschlüsselungs-Algorithmus im Anhang des Buches Cryptonomicon (ISBN: 344245512X) von Neal Stephenson. Im Buch dient der Algorithmus zwei Freiheitskämpfern Nachrichten ohne großen technischen Aufwand zu verschlüsseln.
Eine Ausführliche Beschreibung des Algorithmus findet sich zum einen im bereits erwähnten Buch von Stephonson und zum anderen auf der Webseite von Bruce Schneier.
]]></description>
			<content:encoded><![CDATA[<!-- google_ad_section_start --><p><p align="justify">Aufmerksam geworden bin ich auf diesen <a target="_blank" href="http://de.wikipedia.org/wiki/Verschl%C3%BCsselung">Verschlüsselungs</a>-<a target="_blank" href="http://de.wikipedia.org/wiki/Algorithmus">Algorithmus</a> im Anhang des Buches <a target="_blank" href="http://de.wikipedia.org/wiki/Cryptonomicon">Cryptonomicon</a> (ISBN: <a target="_blank" href="http://www.amazon.de/exec/obidos/ASIN/344245512X/qid=1125686273/sr=8-1/ref=sr_8_xs_ap_i1_xgl/028-5429855-9587736">344245512X</a>) von <a target="_blank" href="http://de.wikipedia.org/wiki/Neal_Stephenson">Neal Stephenson</a>. Im Buch dient der Algorithmus zwei Freiheitskämpfern Nachrichten ohne großen technischen Aufwand zu verschlüsseln.<br />
Eine Ausführliche Beschreibung des Algorithmus findet sich zum einen im bereits erwähnten Buch von Stephonson und zum anderen auf der <a target="_blank" href="http://www.schneier.com/solitaire.html">Webseite</a> von <a target="_blank" href="http://de.wikipedia.org/wiki/Bruce_Schneier">Bruce Schneier</a>.</p>
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		<title>Kryptologie im Zweiten Weltkrieg</title>
		<link>http://blog.project-sierra.de/archives/20</link>
		<comments>http://blog.project-sierra.de/archives/20#comments</comments>
		<pubDate>Thu, 01 Sep 2005 19:48:52 +0000</pubDate>
		<dc:creator>skarabaeus</dc:creator>
				<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[History]]></category>

		<guid isPermaLink="false">http://blog.project-sierra.de/?p=20</guid>
		<description><![CDATA[In letzter Zeit habe ich einige interessante Artikel über Kryptologie im zweiten Weltkrieg gelesen. Alle Artikel sind von Klaus Schmeh verfasst und auf Telepolis veröffentlicht.
Zwei Artikel von 2004&#8230;
Als deutscher Code-Knacker im Zweiten Weltkrieg
Hitlers letzte Maschinen
&#8230; und eine aktuelle Serie mit Enigma-Zeitzeugenberichten:
Teil 1: &#8220;Eine Ansammlung von spinnerten oder genialen Individuen&#8221;
Teil 2: Probleme beim täglichen Einsatz
Teil 3: [...]]]></description>
			<content:encoded><![CDATA[<!-- google_ad_section_start --><p><p align="justify">In letzter Zeit habe ich einige interessante Artikel über Kryptologie im zweiten Weltkrieg gelesen. Alle Artikel sind von <a target="blank" href="http://de.wikipedia.org/wiki/Klaus_Schmeh">Klaus Schmeh</a> verfasst und auf <a target="blank" href="http://www.heise.de/tp/">Telepolis</a> veröffentlicht.</p>
<p>Zwei Artikel von 2004&#8230;<br />
<a target="blank" href="http://www.heise.de/tp/r4/artikel/18/18371/1.html">Als deutscher Code-Knacker im Zweiten Weltkrieg</a><br />
<a target="blank" href="http://www.heise.de/tp/r4/artikel/17/17995/1.html">Hitlers letzte Maschinen</a></p>
<p>&#8230; und eine aktuelle Serie mit Enigma-Zeitzeugenberichten:<br />
<a target="blank" href="http://www.heise.de/tp/r4/artikel/20/20605/1.html">Teil 1: &#8220;Eine Ansammlung von spinnerten oder genialen Individuen&#8221;</a><br />
<a target="blank" href="http://www.heise.de/tp/r4/artikel/20/20719/1.html">Teil 2: Probleme beim täglichen Einsatz</a><br />
<a target="blank" href="http://www.heise.de/tp/r4/artikel/20/20750/1.html">Teil 3: Enigma-Schwachstellen auf der Spur</a></p>
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