Blogs / Personal blogs

Colin Percival

daemonology.net

Not on this site, but still likely to be of interest, is my Tarsnap online backup service .

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Visit daemonology.net → On Hacker News Nov 2008 – Oct 2026

Security & Privacy 22Tech Industry & Business 21Infrastructure & DevOps 16Systems & Performance 12Software Engineering 7Life, Learning & Writing 6

1

On the Use of a Life

First, to dispense with the philosophical argument: Yes, this is my life, and yes, I'm free to use — or waste — it however I please; but I don't think there's anything wrong with asking if this is how my time could be best spent. That applies doubly if the question is not merely about the choices I made but is rather…

2

When security goes right

A few weeks ago, I heard that my slow and unreliable ISP was raising their prices, and I decided to look around for a better ISP. I found one in the form of Novus , which has fibre runs to towers around the Vancouver area. I signed up; they came to the building and placed the necessary patch cable in the basement…

3

Thoughts on Startup School

Perhaps my expectations were misaligned, but I was astonished at how geek-unfriendly the event was. At conferences like BSDCan , one of the major considerations is the availability of power sockets; at Startup School, not only were the power sockets very limited — we were in a theatre with perhaps a dozen outlets…

4

Cheating on a string theory exam

You and your friend have watches which are synchronized to the second, and the proctors are used to him often finishing exams quickly and won't be suspicious if he leaves early. What is the largest value N such that you can guarantee that you answer at least N out of the 23 questions correctly?

6

The Duty of a Scholar

There was a joke at the time that although the National Security Agency had opened up in recent years and started taking their defensive role more seriously, the one aspect of cryptography which they would never discuss publicly was side channel attacks — and this itself constituted a side channel, revealing the…