You can find the code for this post here and install the CLI with winget install defang or eval "$(curl -fsSL s.defang.io/install)". Christmas is nearing, and this year I’m once again spending t...

When I went to Europe this summer, I was eager to try my Commodore 64, because I had just bought the Ultimate II+. This cardridge emulates the 1541 disk drive, and has a lot of other features, like...

This is a small shell script that I wrote to help with encoding/decoding Base64-URL encoded data. It basically invokes the platform’s base64 and sed to turn regular Base64 into Base64-URL. By the ...

這是我7月29日在深圳《以太坊》区块链中国深圳启动大会关于《加密硬件》演讲的PDF： These are the slides for my talk at the launch of Ethereum Meetup in Shenzhen, July 29th 2017. This talk was a slightly more hardware focused version of ...

Hardware Digital Signatures have clear security advantages over their software counterparts, and crypto hardware is getting ubiquitous. These are the slides of my talk for January’s installment of...

Hardware Signing for Ethereum All popular blockchains, starting with Bitcoin through Ethereum all the way up to Zcash, use the Elliptic Curve Digital Signature Algorithm (ECDSA) for cryptographical...

On the way to meeting a friend in a bar, it started pouring like crazy yesterday night and I got stuck under the ledge of a building, waiting for the rain to stop. Rain in Hong Kong is intense, bu...

This post is a condensed version of the talk I gave at IoT Asia 2016 in Singapore, talking about the birth of an IoT device, its subsequent development, all the way up to (SPOILERS but not includin...

I can’t seem to keep my eyes open for long when flying. So right after boarding in Tehran, I fell asleep. “Sir. Sir.” I turn my head to the source of the sound and open my eyes. I got woken up by...

Inspired by our current ‘post-fact democracy’, I had the thought that maybe the internet isn’t the democratic safeguard that people believed it to be in the 90s and 00s. Before the internet, infor...