How an HTTP header caused time.gov to skew from UTC
Exploring a clock synchronization problem
Built on Shards of Silicon: Robert Alexander's Tech Blog
A personal blog featuring nuanced deep dives into #Tech, #Security, and the #Cloud
Latest posts
This blog post tells the time
Using Cloudflare CDN to synchronize a clock
GUID reuse in WordPress
Surprising collisions of WordPress post GUIDs
Uptime of GitHub Pages alternatives
Measuring service availability of static website hosting
RSS feed discovery with FeedLand
FeedLand enables social blog discovery
Does the Internet know what time is it?
Measuring out-of-sync clocks on the Internet
Discovering the indieweb with calm tech
Blog Quest and StreetPass help you discover the independent web
Oops, my UUIDs collided!
Why UUID collisions happen in practice
The UUID collection
Publishing my first collection of blog posts
Why UUIDs won't protect your secrets
UUIDs and Indirect Object Reference
The most popular email providers
Measuring the popularity of email hosting providers
Choosing Vim over VSCode
Why I keep coming back to Vim
MTA-STS Preload
Tracking domains that support MTA-STS
The next stage of getlocalcert.net
Keeping the project going
Is email confidential in transit yet?
Measuring vulnerable SMTP configurations and defenses
TLDs with novel behavior
Thoughts on .internal and gTLDs
SMTP Downgrade Attacks and MTA-STS
Running a bunch of mail servers to audit email security
One year of getlocalcert.net
Reflecting on a year of running a free domain registration service
Moving to Hugo
My blog now uses the Hugo blog framework
RSS Categories - In Practice
How do RSS Categories work in practice?
RSS blogrolls are a federated social network
Could a modern look at RSS feeds and blogrolls help the small-web much like the fediverse is revitalizing community in social networks?
Designing Personal Software
Why we need more to-do apps
Certificate Authority Trustworthiness
Challenges facing the CAs and why we still trust them
HSTS preload adoption and challenges
A review of HSTS and HSTS preload list growth
A mental model for on-demand pricing
A model for thinking about AWS EC2 on-demand and reserved pricing
Improving HTTPS on private networks
Launching the getlocalcert.net service
Name "Constrain't" on Chrome
When Name Constraints ain’t enforced