Detecting Manual AWS Console Actions
Nov 12th, 2019 | 20 minute readUPDATE 2/18/24: Check out the update to this post 🙂
Arkadiy Tetelman A security blog
Pair Locking your iPhone with Configurator 2
Oct 7th, 2019 | 11 minute readIn response to the recent iphone bootrom bug (and also because I was already in the market for a new phone), I recently purchased a new iPhone XR. This gave me a chance to re-run the steps required to pair lock the device, a process which prevents law enforcement from using forensics tools against your phone, and the result of which is this blog post.
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Quantifying Untrusted Symantec Certificates
Feb 4th, 2018 | 17 minute readI was reading Hackernews the other day when I came upon the following tweet: 
which made me curious to quantify exactly how many and which sites will have their trust removed. This blog post answers these questions by writing a scanner to detect bad Symantec certificates (using the same logic Google Chrome uses), and running it against the Alexa Top 1 Million sites. But first, some context.
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Deploying EFF's Certbot in AWS Lambda
Jan 26th, 2018 | 13 minute readThis post describes the steps needed to deploy Certbot (a well-maintained LetsEncrypt/ACME client) inside AWS Lambda. The setup used below is now powering 100% automated TLS certificate renewals for this website - the lambda runs once a day and if there’s less than 30 days remaining on my existing cert it will provision a new one and import it to be served by my CDN.
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