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	<title>TLS &#8211; Noise</title>
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	<link>https://noise.getoto.net</link>
	<description>The collective thoughts of the interwebz</description>
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		<title>Building a post-quantum certificate authority with Merkle Tree Certificates</title>
		<link>https://noise.getoto.net/2026/09/29/building-a-post-quantum-certificate-authority-with-merkle-tree-certificates/</link>
		
		<dc:creator><![CDATA[Mari Galicer]]></dc:creator>
		<pubDate>Tue, 29 Sep 2026 13:00:00 +0000</pubDate>
				<category><![CDATA[Birthday Week]]></category>
		<category><![CDATA[Certificate Transparency]]></category>
		<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[post quantum]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[TLS]]></category>
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					<description><![CDATA[As post-quantum signatures threaten to inflate TLS handshakes and certificate transparency logs, Merkle Tree Certificates offer a path to compact, auditable authentication. Cloudflare’s new certificate authority will support MTC issuance at scale.]]></description>
		
		
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			</item>
		<item>
		<title>Building a certificate authority for the whole Internet</title>
		<link>https://noise.getoto.net/2026/09/29/building-a-certificate-authority-for-the-whole-internet/</link>
		
		<dc:creator><![CDATA[Steve Goldsmith]]></dc:creator>
		<pubDate>Tue, 29 Sep 2026 13:00:00 +0000</pubDate>
				<category><![CDATA[Birthday Week]]></category>
		<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[post quantum]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=2340123cfed589eb3274e9e2b7342a15</guid>

					<description><![CDATA[Twelve years after launching Universal SSL, Cloudflare is applying to become a certificate authority. By combining an established root, an ACME-first approach, and Merkle Tree Certificates, we are building a post-quantum CA for the open web.]]></description>
		
		
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			</item>
		<item>
		<title>Automatic Key Exchange: faster, post-quantum secure origin handshakes for 45 billion daily connections (and counting)</title>
		<link>https://noise.getoto.net/2026/09/08/automatic-key-exchange-faster-post-quantum-secure-origin-handshakes-for-45-billion-daily-connections-and-counting/</link>
		
		<dc:creator><![CDATA[Suleman Ahmad]]></dc:creator>
		<pubDate>Tue, 08 Sep 2026 13:10:00 +0000</pubDate>
				<category><![CDATA[Application Security]]></category>
		<category><![CDATA[Application Services*]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[post quantum]]></category>
		<category><![CDATA[research]]></category>
		<category><![CDATA[SSL]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=958059b50838ea3e9b160a1ace5d7e39</guid>

					<description><![CDATA[Automatic Key Exchange probes TLS 1.3-capable customer origins to learn which key agreement algorithms they support. We then lead with the most secure algorithm when connecting to the origin, preferring post-quantum connections wherever the origin supports it.]]></description>
		
		
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			</item>
		<item>
		<title>Certificate Transparency Monitoring is now generally available</title>
		<link>https://noise.getoto.net/2026/08/13/certificate-transparency-monitoring-is-now-generally-available/</link>
		
		<dc:creator><![CDATA[Pravallika Nakarikanti]]></dc:creator>
		<pubDate>Thu, 13 Aug 2026 13:00:00 +0000</pubDate>
				<category><![CDATA[Certificate Transparency]]></category>
		<category><![CDATA[SSL]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=68075b6ccf45a7497f810471f2f5611c</guid>

					<description><![CDATA[Cloudflare's Certificate Transparency Monitoring is now generally available. The biggest change: we no longer email you about certificates Cloudflare issued for your domain, so when an alert lands in your inbox, it's worth a look.]]></description>
		
		
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			</item>
		<item>
		<title>Post-quantum authentication to origins is now supported</title>
		<link>https://noise.getoto.net/2026/07/29/post-quantum-authentication-to-origins-is-now-supported/</link>
		
		<dc:creator><![CDATA[Luke Valenta]]></dc:creator>
		<pubDate>Wed, 29 Jul 2026 13:00:00 +0000</pubDate>
				<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[cybersecurity]]></category>
		<category><![CDATA[post quantum]]></category>
		<category><![CDATA[research]]></category>
		<category><![CDATA[SSL]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=7c9eb601d13be1062fab05efcaf95163</guid>

					<description><![CDATA[Cloudflare now supports post-quantum (PQ) authentication when connecting to customer origin servers via Authenticated Origin Pulls and Custom Origin Trust Store. This is the first step towards providing PQ authentication for all Cloudflare products.]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>Automating post-quantum cryptography readiness using AWS Config</title>
		<link>https://noise.getoto.net/2026/05/14/automating-post-quantum-cryptography-readiness-using-aws-config/</link>
		
		<dc:creator><![CDATA[Pravin Nair]]></dc:creator>
		<pubDate>Thu, 14 May 2026 16:18:20 +0000</pubDate>
				<category><![CDATA[Advanced (300)]]></category>
		<category><![CDATA[api gateway]]></category>
		<category><![CDATA[AWS Config]]></category>
		<category><![CDATA[Conformation pack]]></category>
		<category><![CDATA[Elastic Load Balancing]]></category>
		<category><![CDATA[encryption]]></category>
		<category><![CDATA[post quantum]]></category>
		<category><![CDATA[Security Blog]]></category>
		<category><![CDATA[Security, Identity & Compliance]]></category>
		<category><![CDATA[Technical How-to]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=d9a06e03c2dab7b26c4d86eb6502c3d6</guid>

					<description><![CDATA[Migrating your TLS endpoints to Post-quantum cryptography (PQC) starts with understanding your current TLS endpoint inventory and posture. This post introduces the PQC Readiness Scanner — an automated tool that inventories your Application Load Balancer (ALB), Network Load Balancer (NLB), and Amazon API Gateway endpoints and continuously monitors their TLS configurations for PQC readiness. The […]]]></description>
		
		
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			</item>
		<item>
		<title>Keeping the Internet fast and secure: introducing Merkle Tree Certificates</title>
		<link>https://noise.getoto.net/2025/10/28/keeping-the-internet-fast-and-secure-introducing-merkle-tree-certificates/</link>
		
		<dc:creator><![CDATA[Luke Valenta]]></dc:creator>
		<pubDate>Tue, 28 Oct 2025 13:00:00 +0000</pubDate>
				<category><![CDATA[chrome]]></category>
		<category><![CDATA[Cloudflare Workers]]></category>
		<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[google]]></category>
		<category><![CDATA[IETF]]></category>
		<category><![CDATA[open source]]></category>
		<category><![CDATA[post quantum]]></category>
		<category><![CDATA[research]]></category>
		<category><![CDATA[Rust]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[TLS]]></category>
		<category><![CDATA[transparency]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=12d96be530965ce03ad288b3fe57a503</guid>

					<description><![CDATA[Cloudflare is launching an experiment with Chrome to evaluate fast, scalable, and quantum-ready Merkle Tree Certificates, all without degrading performance or changing WebPKI trust relationships.]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>Eliminating Cold Starts 2: shard and conquer</title>
		<link>https://noise.getoto.net/2025/09/26/eliminating-cold-starts-2-shard-and-conquer/</link>
		
		<dc:creator><![CDATA[Harris Hancock]]></dc:creator>
		<pubDate>Fri, 26 Sep 2025 13:00:00 +0000</pubDate>
				<category><![CDATA[Birthday Week]]></category>
		<category><![CDATA[Cap'n Proto]]></category>
		<category><![CDATA[Cloudflare Workers]]></category>
		<category><![CDATA[Engineering]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=20f851adcd707f957adf6c1cf562c989</guid>

					<description><![CDATA[We reduced Cloudflare Workers cold starts by 10x by optimistically routing to servers with already-loaded Workers. Learn how we did it here.]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>Automatically Secure: how we upgraded 6,000,000 domains by default to get ready for the Quantum Future</title>
		<link>https://noise.getoto.net/2025/09/24/automatically-secure-how-we-upgraded-6000000-domains-by-default-to-get-ready-for-the-quantum-future/</link>
		
		<dc:creator><![CDATA[Alex Krivit]]></dc:creator>
		<pubDate>Wed, 24 Sep 2025 14:00:00 +0000</pubDate>
				<category><![CDATA[Birthday Week]]></category>
		<category><![CDATA[CDN]]></category>
		<category><![CDATA[encryption]]></category>
		<category><![CDATA[post quantum]]></category>
		<category><![CDATA[research]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=8b1cae5c85010f9c61674945c1ffa777</guid>

					<description><![CDATA[After a year since we started enabling Automatic SSL/TLS, we want to talk about these results, why they matter, and how we’re preparing for the next leap in Internet security.]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>Addressing the unauthorized issuance of multiple TLS certificates for 1.1.1.1</title>
		<link>https://noise.getoto.net/2025/09/04/addressing-the-unauthorized-issuance-of-multiple-tls-certificates-for-1-1-1-1/</link>
		
		<dc:creator><![CDATA[Joe Abley]]></dc:creator>
		<pubDate>Thu, 04 Sep 2025 17:30:00 +0000</pubDate>
				<category><![CDATA[1.1.1.1]]></category>
		<category><![CDATA[Certificate Authority]]></category>
		<category><![CDATA[Certificate Transparency]]></category>
		<category><![CDATA[DNS]]></category>
		<category><![CDATA[doh]]></category>
		<category><![CDATA[Resolver]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=05eaab01b65450877bcfbf0ae120a924</guid>

					<description><![CDATA[Unauthorized TLS certificates were issued for 1.1.1.1 by a Certification Authority without permission from Cloudflare. These rogue certificates have now been revoked.]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>The importance of encryption and how AWS can help</title>
		<link>https://noise.getoto.net/2025/02/12/the-importance-of-encryption-and-how-aws-can-help/</link>
		
		<dc:creator><![CDATA[Ken Beer]]></dc:creator>
		<pubDate>Wed, 12 Feb 2025 19:18:47 +0000</pubDate>
				<category><![CDATA[aes]]></category>
		<category><![CDATA[AWS CloudHSM]]></category>
		<category><![CDATA[AWS Key Management Service*]]></category>
		<category><![CDATA[AWS KMS]]></category>
		<category><![CDATA[encryption]]></category>
		<category><![CDATA[Foundational (100)]]></category>
		<category><![CDATA[Key management]]></category>
		<category><![CDATA[openssl]]></category>
		<category><![CDATA[s2n]]></category>
		<category><![CDATA[Security Blog]]></category>
		<category><![CDATA[Security, Identity & Compliance]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=6b326a97a1de81e6d46682ccc3f86cb6</guid>

					<description><![CDATA[February 12, 2025: This post was republished to include new services and features that have launched since the original publication date of June 11, 2020. Encryption is a critical component of a defense-in-depth security strategy that uses multiple defensive mechanisms to protect workloads, data, and assets. As organizations look to innovate while building trust with […]]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>Resolving a Mutual TLS session resumption vulnerability</title>
		<link>https://noise.getoto.net/2025/02/07/resolving-a-mutual-tls-session-resumption-vulnerability/</link>
		
		<dc:creator><![CDATA[Matt Bullock]]></dc:creator>
		<pubDate>Fri, 07 Feb 2025 20:13:14 +0000</pubDate>
				<category><![CDATA[Network Services]]></category>
		<category><![CDATA[SASE]]></category>
		<category><![CDATA[TLS]]></category>
		<category><![CDATA[vulnerabilities]]></category>
		<category><![CDATA[waf]]></category>
		<category><![CDATA[Zero-Trust]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=0ddbf960332740e3a3c95e2494b35a7c</guid>

					<description><![CDATA[Cloudflare patched a Mutual TLS (mTLS) vulnerability (CVE-2025-23419) reported via its Bug Bounty Program. The flaw in session resumption allowed client certificates to authenticate across different]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>A look at the latest post-quantum signature standardization candidates</title>
		<link>https://noise.getoto.net/2024/11/07/a-look-at-the-latest-post-quantum-signature-standardization-candidates/</link>
		
		<dc:creator><![CDATA[Bas Westerbaan]]></dc:creator>
		<pubDate>Thu, 07 Nov 2024 14:00:00 +0000</pubDate>
				<category><![CDATA[Cryptography]]></category>
		<category><![CDATA[post quantum]]></category>
		<category><![CDATA[research]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=248c931c8141d402c69a387c189d9d37</guid>

					<description><![CDATA[NIST has standardized four post-quantum signature schemes so far, and they’re not done yet: there are fourteen new candidates in the running for standardization. In this blog post we take measure of them and discover why we ended up with so many PQ signatures.]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>Options for AWS customers who use Entrust-issued certificates</title>
		<link>https://noise.getoto.net/2024/10/18/options-for-aws-customers-who-use-entrust-issued-certificates/</link>
		
		<dc:creator><![CDATA[Zach Miller]]></dc:creator>
		<pubDate>Fri, 18 Oct 2024 12:48:47 +0000</pubDate>
				<category><![CDATA[ACM]]></category>
		<category><![CDATA[AWS Certificate Manager]]></category>
		<category><![CDATA[certificate management]]></category>
		<category><![CDATA[certificates]]></category>
		<category><![CDATA[Foundational (100)]]></category>
		<category><![CDATA[Security Blog]]></category>
		<category><![CDATA[Security, Identity & Compliance]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=912b5e29597be86447daf6d995b5428a</guid>

					<description><![CDATA[Multiple popular browsers have announced that they will no longer trust public certificates issued by Entrust later this year. Certificates that are issued by Entrust on dates up to and including October 31, 2024 will continue to be trusted until they expire, according to current information from browser makers. Certificates issued by Entrust after that date […]]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>New standards for a faster and more private Internet</title>
		<link>https://noise.getoto.net/2024/09/25/new-standards-for-a-faster-and-more-private-internet/</link>
		
		<dc:creator><![CDATA[Matt Bullock]]></dc:creator>
		<pubDate>Wed, 25 Sep 2024 13:00:00 +0000</pubDate>
				<category><![CDATA[Birthday Week]]></category>
		<category><![CDATA[compression]]></category>
		<category><![CDATA[Privacy]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=d35b7c9be585f87cef5f86af3611f5a3</guid>

					<description><![CDATA[Cloudflare's customers can now take advantage of Zstandard (zstd) compression, offering 42% faster compression than Brotli and 11.3% more efficiency than GZIP. We're further optimizing performance for our customers with HTTP/3 prioritization and BBR congestion control, and enhancing privacy through Encrypted Client Hello (ECH).]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>Encryption in transit over external networks: AWS guidance for NYDFS and beyond</title>
		<link>https://noise.getoto.net/2024/08/21/encryption-in-transit-over-external-networks-aws-guidance-for-nydfs-and-beyond/</link>
		
		<dc:creator><![CDATA[Aravind Gopaluni]]></dc:creator>
		<pubDate>Wed, 21 Aug 2024 15:23:24 +0000</pubDate>
				<category><![CDATA[AWS Certificate Manager]]></category>
		<category><![CDATA[AWS Direct Connect]]></category>
		<category><![CDATA[AWS Nitro System]]></category>
		<category><![CDATA[Best practices]]></category>
		<category><![CDATA[client-side encryption]]></category>
		<category><![CDATA[encryption]]></category>
		<category><![CDATA[Financial Services]]></category>
		<category><![CDATA[Industries]]></category>
		<category><![CDATA[Intermediate (200)]]></category>
		<category><![CDATA[Security Blog]]></category>
		<category><![CDATA[Security, Identity & Compliance]]></category>
		<category><![CDATA[Technical How-to]]></category>
		<category><![CDATA[Thought Leadership]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=1d6ea7f3c4d4d7cf8270b5f872323c5c</guid>

					<description><![CDATA[On November 1, 2023, the New York State Department of Financial Services (NYDFS) issued its Second Amendment (the Amendment) to its Cybersecurity Requirements for Financial Services Companies adopted in 2017, published within Section 500 of 23 NYCRR 500 (the Cybersecurity Requirements; the Cybersecurity Requirements as amended by the Amendment, the Amended Cybersecurity Requirements). In the introduction […]]]></description>
		
		
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			</item>
		<item>
		<title>Introducing Automatic SSL/TLS: securing and simplifying origin connectivity</title>
		<link>https://noise.getoto.net/2024/08/08/introducing-automatic-ssl-tls-securing-and-simplifying-origin-connectivity/</link>
		
		<dc:creator><![CDATA[Alex Krivit]]></dc:creator>
		<pubDate>Thu, 08 Aug 2024 13:05:18 +0000</pubDate>
				<category><![CDATA[encryption]]></category>
		<category><![CDATA[Network Services]]></category>
		<category><![CDATA[SSL]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=8fde25bba0820f05518392ae8e26e09a</guid>

					<description><![CDATA[This new Automatic SSL/TLS setting will maximize and simplify the encryption modes Cloudflare uses to communicate with origin servers by using the SSL/TLS Recommender]]></description>
		
		
		<enclosure url="" length="0" type="" />

			</item>
		<item>
		<title>Avoiding downtime: modern alternatives to outdated certificate pinning practices</title>
		<link>https://noise.getoto.net/2024/07/29/avoiding-downtime-modern-alternatives-to-outdated-certificate-pinning-practices/</link>
		
		<dc:creator><![CDATA[Dina Kozlov]]></dc:creator>
		<pubDate>Mon, 29 Jul 2024 13:00:37 +0000</pubDate>
				<category><![CDATA[Certificate pinning]]></category>
		<category><![CDATA[Certificate Transparency]]></category>
		<category><![CDATA[Network Services]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[SSL]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=511a35c1c75c572507f5a4029ec44d49</guid>

					<description><![CDATA[The number of outages caused by certificate pinning is increasing. We’ll explore why certificate pinning hasn’t kept up with modern standards and recommend alternatives to improve security while reducing management overhead]]></description>
		
		
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		<item>
		<title>How we ensure Cloudflare customers aren&#8217;t affected by Let&#8217;s Encrypt&#8217;s certificate chain change</title>
		<link>https://noise.getoto.net/2024/04/12/how-we-ensure-cloudflare-customers-arent-affected-by-lets-encrypts-certificate-chain-change/</link>
		
		<dc:creator><![CDATA[Dina Kozlov]]></dc:creator>
		<pubDate>Fri, 12 Apr 2024 13:00:09 +0000</pubDate>
				<category><![CDATA[Application Services*]]></category>
		<category><![CDATA[Certificate Authority]]></category>
		<category><![CDATA[deep dive]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[SSL]]></category>
		<category><![CDATA[TLS]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=fabde7e99f9dd008ce144743fd63e8a6</guid>

					<description><![CDATA[Let’s Encrypt’s cross-signed chain will be expiring in September. This will affect legacy devices with outdated trust stores (Android versions 7.1.1 or older). To prevent this change from impacting customers, Cloudflare will shift Let’s Encrypt certificates upon renewal to use a different CA]]></description>
		
		
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		<item>
		<title>Upcoming Let’s Encrypt certificate chain change and impact for Cloudflare customers</title>
		<link>https://noise.getoto.net/2024/03/14/upcoming-lets-encrypt-certificate-chain-change-and-impact-for-cloudflare-customers/</link>
		
		<dc:creator><![CDATA[Dina Kozlov]]></dc:creator>
		<pubDate>Thu, 14 Mar 2024 14:00:23 +0000</pubDate>
				<category><![CDATA[Application Security]]></category>
		<category><![CDATA[Developer Platform]]></category>
		<category><![CDATA[Developers]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[SSL]]></category>
		<category><![CDATA[TLS]]></category>
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					<description><![CDATA[Let’s Encrypt’s cross-signed chain will be expiring in September. To prepare for the change, after May 15th, 2024, Cloudflare will start issuing certs from Let’s Encrypt’s ISRG X1 chain. This change will impact legacy devices with outdated trust stores (Android versions 7.1.1 or older)]]></description>
		
		
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