Bjarni Rúnar Einarsson

Bjarni Rúnar Einarsson is an Icelandic hacker who has been working on software development and systems administration since the mid-90s. He cares deeply about Open Source, digital autonomy and user privacy.

Bjarni created and runs PageKite (, and was one of the founding members and lead developer of Mailpile ( He still works on both projects as much as he can.

Bjarni tweets things at .

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Using Passcrow to recover from lost passwords
Bjarni Rúnar Einarsson

Have you ever forgotten a passphrase or lost a hardware token? Lost access to enough Bitcoin to buy a pizza or two? Encryption is fundamental to securing our liberties, but key and password management remain difficult even for professionals, let alone the general public.

This talk presents Passcrow, an Open Source project attempting to address one of crypto's largest usability issues: password and key recovery in a decentralized environment.

MCH2022 Curated content
Battery 🔋
Building public, dynamic webapps using Micropython on the ESP32
Bjarni Rúnar Einarsson

This workshop will introduce upagekite, an open source micro-framework for building dynamic, public webapps using Micropython on the low-cost ESP32 system-on-a-chip.

This session will start with participants plugging the ESP32 (an ESP32-CAM devkit) into their laptops for the first time, and by the end of it they will have a running web server on the public Internet - running in a few hundred KB of RAM on a chip that costs only a few euro.

MCH2022 Curated content