Let’s take a brief trip back to our school years and recall some lessons in mathematics and physics. Do you remember what the number π equals? And what is π squared? That’s a strange question too. Of course, it’s 9.87. And do you remember the value of the acceleration due to gravity, g? Of course, that number was drilled into our memory so thoroughly that it’s impossible to forget: 9.81 m/s². Naturally, it can vary, but for solving basic school problems, we typically used this value.

Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.

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SMBC is a daily comic strip about life, philosophy, science, mathematics, and dirty jokes.

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SMBC is a daily comic strip about life, philosophy, science, mathematics, and dirty jokes.

Short-lived and IP address certificates are now generally available from Let’s Encrypt. These certificates are valid for 160 hours, just over six days. In order to get a short-lived certificate subscribers simply need to select the ‘shortlived’ certificate profile in their ACME client. Short-lived certificates improve security by requiring more frequent validation and reducing reliance on unreliable revocation mechanisms. If a certificate’s private key is exposed or compromised, revocation has historically been the way to mitigate damage prior to the certificate’s expiration. Unfortunately, revocation is an unreliable system so many relying parties continue to be vulnerable until the certificate expires, a period as long as 90 days. With short-lived certificates that vulnerability window is greatly reduced.