Get Smart

Explore the possibilities of Ethereum's smart contract feature

Feb 03, 2022

The Ethereum cryptocurrency system lets you build programs into the blockchain to orchestrate complex transactions and document results. We'll show you how to get started with Ethereum's smart contracts.

Little Brother

Doas authenticates as a simpler version of Sudo

Sep 27, 2021

The Sudo privilege management tool is big and complicated, with many advanced options that only an expert would need. Doas is far simpler – which might just make it safer for desktop users.

Hardened Choice

Data encryption with SiriKali

Sep 27, 2021

SiriKali encrypts files and directories with just a few mouse clicks, without the inefficiency of fixed-size containers.

Tutorial – HedgeDoc

Write, share, and publish documents with HedgeDoc

Sep 27, 2021

HedgeDoc lets you write documents collaboratively in Markdown and publish them online.

Not So Brave New World

A for-profit, open source browser

May 18, 2022

The Brave browser promises speed and privacy, but its quest for profit compromises security at every turn.

Rapid Resizer

Batch processing image files with imgp

Sep 27, 2021

In no time at all, imgp can change the resolution of images, as well as convert files from PNG to JPEG, remove metadata, and rotate images.

Card Games

Protecting your private key with the OpenPGP smartcard

Sep 27, 2021

Improve communication security with GnuPG and the OpenPGP smartcard.


Provable security and other problems in modern cryptography

Mar 02, 2022

A concept called provable security brings the rigor of mathematics to the art of cryptography.

Fast Web

Building a website in Markdown with Pandoc

Sep 27, 2021

Build a simple web page in Markdown; then convert it to HTML at the command line.

Digital Classroom

Managing and monitoring computer labs

Sep 27, 2021

If your school's computer lab consists of Linux machines, Epoptes provides an interesting alternative to conventional management and monitoring programs.

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