<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:wfw="http://wellformedweb.org/CommentAPI/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
	xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
	>

<channel>
	<title>Cryptosmith &#187; stream cipher</title>
	<atom:link href="http://www.cryptosmith.com/archives/tag/stream-cipher/feed" rel="self" type="application/rss+xml" />
	<link>http://www.cryptosmith.com</link>
	<description>Authentication, crypto, information security, and life with gadgets - Rick Smith</description>
	<lastBuildDate>Sun, 08 Aug 2010 19:00:24 +0000</lastBuildDate>
	<language>en</language>
	<sy:updatePeriod>hourly</sy:updatePeriod>
	<sy:updateFrequency>1</sy:updateFrequency>
	<generator>http://wordpress.org/?v=abc</generator>
		<item>
		<title>Vernam&#8217;s Cipher</title>
		<link>http://www.cryptosmith.com/archives/769</link>
		<comments>http://www.cryptosmith.com/archives/769#comments</comments>
		<pubDate>Mon, 07 Sep 2009 16:06:34 +0000</pubDate>
		<dc:creator>Dr. Rick Smith</dc:creator>
				<category><![CDATA[History of Technology]]></category>
		<category><![CDATA[Security]]></category>
		<category><![CDATA[AT&T]]></category>
		<category><![CDATA[crypto]]></category>
		<category><![CDATA[IEEE]]></category>
		<category><![CDATA[one time pad]]></category>
		<category><![CDATA[reused key]]></category>
		<category><![CDATA[stream cipher]]></category>
		<category><![CDATA[Vernam]]></category>
		<category><![CDATA[xor]]></category>

		<guid isPermaLink="false">http://www.cryptosmith.com/?p=769</guid>
		<description><![CDATA[Gilbert Vernam was a digital systems designer from the early 20th century. He invented the stream cipher, what browsers often use today to encrypt messages exchanged with protected web sites. In his days, however, the mechanism of choice was the relay: an electromagnetic switch. Vernam also described the one-time pad, and noted the danger in [...]]]></description>
		<wfw:commentRss>http://www.cryptosmith.com/archives/769/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Matlab, RC4, and Crypto-Graphics</title>
		<link>http://www.cryptosmith.com/archives/621</link>
		<comments>http://www.cryptosmith.com/archives/621#comments</comments>
		<pubDate>Wed, 13 May 2009 23:09:06 +0000</pubDate>
		<dc:creator>Rick (l) Smith</dc:creator>
				<category><![CDATA[Security]]></category>
		<category><![CDATA[Tech Teaching]]></category>
		<category><![CDATA[block cipher]]></category>
		<category><![CDATA[cipher modes]]></category>
		<category><![CDATA[crypto]]></category>
		<category><![CDATA[Matlab]]></category>
		<category><![CDATA[RC4]]></category>
		<category><![CDATA[stream cipher]]></category>

		<guid isPermaLink="false">http://www.cryptosmith.com/?p=621</guid>
		<description><![CDATA[A while back I used graphical images to illustrate why you never, ever want to reuse the keystream of a stream cipher. Recently I&#8217;ve constructed similar examples to show the role of modes in using block ciphers. There&#8217;s a nice set of block mode examples in Wikipedia, but I wanted to include the real result [...]]]></description>
		<wfw:commentRss>http://www.cryptosmith.com/archives/621/feed</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Stream Cipher Reuse: A Graphic Example</title>
		<link>http://www.cryptosmith.com/archives/70</link>
		<comments>http://www.cryptosmith.com/archives/70#comments</comments>
		<pubDate>Sat, 31 May 2008 15:29:49 +0000</pubDate>
		<dc:creator>Rick (l) Smith</dc:creator>
				<category><![CDATA[Security]]></category>
		<category><![CDATA[NSA]]></category>
		<category><![CDATA[one time pad]]></category>
		<category><![CDATA[pptp]]></category>
		<category><![CDATA[reused key]]></category>
		<category><![CDATA[stream cipher]]></category>
		<category><![CDATA[venona]]></category>
		<category><![CDATA[wep]]></category>
		<category><![CDATA[xor]]></category>

		<guid isPermaLink="false">http://www.cryptosmith.com/?p=70</guid>
		<description><![CDATA[Take a look at the following image. You should see two different &#8216;messages&#8217; here. &#8220;Send Cash&#8221; message We encrypted this image by applying the xor operation. We used a random 128 by 128 bit map for the encryption key. This yielded the following gray block: Encrypted Smiley XOR Encrypted &#8220;Send Cash&#8221; Again, each looks like [...]]]></description>
		<wfw:commentRss>http://www.cryptosmith.com/archives/70/feed</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Encrypting with XOR: A Graphic Example</title>
		<link>http://www.cryptosmith.com/archives/77</link>
		<comments>http://www.cryptosmith.com/archives/77#comments</comments>
		<pubDate>Sat, 09 Jun 2007 14:24:30 +0000</pubDate>
		<dc:creator>Rick (l) Smith</dc:creator>
				<category><![CDATA[Security]]></category>
		<category><![CDATA[crypto]]></category>
		<category><![CDATA[one time pad]]></category>
		<category><![CDATA[stream cipher]]></category>
		<category><![CDATA[xor]]></category>

		<guid isPermaLink="false">http://www.cryptosmith.com/?p=77</guid>
		<description><![CDATA[The exclusive or operation &#8211; a logical function applied to binary bits, like AND, OR, and NOT &#8211; is a fundamental encryption technique. It is often used in stream ciphers, which are widely used in web browsers when connecting to secure web servers. When used properly, this technique provides strong protection. In fact, it is [...]]]></description>
		<wfw:commentRss>http://www.cryptosmith.com/archives/77/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Stream Ciphers</title>
		<link>http://www.cryptosmith.com/archives/62</link>
		<comments>http://www.cryptosmith.com/archives/62#comments</comments>
		<pubDate>Thu, 07 Jun 2007 16:57:14 +0000</pubDate>
		<dc:creator>Rick (l) Smith</dc:creator>
				<category><![CDATA[Security]]></category>
		<category><![CDATA[crypto]]></category>
		<category><![CDATA[one time pad]]></category>
		<category><![CDATA[RC4]]></category>
		<category><![CDATA[stream cipher]]></category>
		<category><![CDATA[xor]]></category>

		<guid isPermaLink="false">http://www.cryptosmith.com/?p=62</guid>
		<description><![CDATA[Whenever your browser establishes a “secure” connection to a web site, it encrypts the data. Traditionally, the browser and site use a stream cipher called Rivest Cipher #4 (RC4), although some sites use newer techniques. Stream ciphers use a deceptively simple mechanism: you combine the plaintext data, bit by bit, with “key” bits, using the [...]]]></description>
		<wfw:commentRss>http://www.cryptosmith.com/archives/62/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
	</channel>
</rss>
