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Scott Helme

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One of eMudhra's certificate authority private keys is the number 4.

Not a number that starts with 4, or the number 4 followed by a few hundred random digits, just, 4... Another one is 56, and another is 115. I know, because I recovered all of them from their public certificates on my laptop just now, and it took less than a second.

What happened

On S...


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A post called Passkeys are a trap. Do not use them. has been doing the rounds over the last few days, making it pretty high on Hacker News, and I've had it sent to me many times with an 'is this true?' kind of vibe. It'...


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I remember being in the room at DEF CON 23 in Las Vegas, in 2015, listening to "Let's Encrypt – Minting Free Certificates to Encrypt the Entire Web". It was still months before Let's Encrypt would launch their public beta and begin cementing 90-day certificates as the new norm. More than a decade later, Let's Encrypt have just


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