Best of 2019

The blog posts Hacker News loved most in 2019. 2,668 posts.

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2404

RSA: Theory and Implementation

RSA has been a staple of public key cryptography for over 40 years, and is still being used today for some tasks in the newest TLS 1.3 standard. This post describes the theory behind RSA - the math that makes it work, as well as some practical considerations; it also presents a complete implementation of RSA key…

2416

The Problem With Hexagons

H exagons are ubiquitous in wargames now (indeed, both Philip Sabin’s War: Studying Conflict Through Simulation Games and Peter Perla’s The Art of Wargaming feature hexagons on their book covers), but this wasn’t always the case. My first wargame – the first board wargame for many of us – was Avalon Hill’s original…

2420

Curve fitting A: Linear Least Squares

The graph on the left shows a third example, taken from analytical chemistry: a straight-line calibration data set where X = concentration and Y = instrument reading (Y = a + b X). Click to download that data . The blue dots are the data points. They don't all fall in a perfect straight line because of random noise…

2424

Sysop Chat

Back in mid-90s before anyone I knew had an Internet connection, a few of us had modems and would use them to call bulletin board systems via the phone line. On these systems what to me seemed the main thing was discussions and chat. For the first time I could talk to other like-minded people, and just being able to…

2429

Cargo's next few years

The Cargo team have been thinking about and discussing long-term plans for Cargo. In this post I'll talk about what we hope Cargo will look like around the time of the next edition (assuming there is another edition and that it happens in about three years, neither of which is