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	<title>GCHQ &#8211; Noise</title>
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		<title>SIGINT During World War II</title>
		<link>https://noise.getoto.net/2025/08/13/sigint-during-world-war-ii/</link>
		
		<dc:creator><![CDATA[Bruce Schneier]]></dc:creator>
		<pubDate>Wed, 13 Aug 2025 11:08:00 +0000</pubDate>
				<category><![CDATA[GCHQ]]></category>
		<category><![CDATA[history of cryptography]]></category>
		<category><![CDATA[history of security]]></category>
		<category><![CDATA[intelligence]]></category>
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		<guid isPermaLink="false">https://www.schneier.com/?p=70567</guid>

					<description><![CDATA[The NSA and GCHQ have jointly published a history of World War II SIGINT: &#8220;Secret Messengers: Disseminating SIGINT in the Second World War.&#8221; This is the story of the British SLUs (Special Liaison Units) and the American SSOs (Special Securi...]]></description>
		
		
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		<item>
		<title>GCHQ Christmas Codebreaking Challenge</title>
		<link>https://noise.getoto.net/2023/12/20/gchq-christmas-codebreaking-challenge/</link>
		
		<dc:creator><![CDATA[Bruce Schneier]]></dc:creator>
		<pubDate>Wed, 20 Dec 2023 12:05:24 +0000</pubDate>
				<category><![CDATA[cryptanalysis]]></category>
		<category><![CDATA[GCHQ]]></category>
		<category><![CDATA[history of cryptography]]></category>
		<category><![CDATA[Uncategorized]]></category>
		<guid isPermaLink="false">https://www.schneier.com/?p=68215</guid>

					<description><![CDATA[Looks like fun.
Details here.
]]></description>
		
		
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