It’s time again for our bimonthly meeting. We’ll be meeting at Rudolphs Bar-B-Que again starting at 18:30 (6:30 p.m.).

We’ve mentioned several secure communication apps but the one we most commonly recommend is Signal. Signal is great because it offers effective end-to-end encryption for text messages, voice calls, and video calls in an easy to use package. However, as many people have pointed out, Signal’s reliance on phone numbers as an identifier is undesirable in many situations.

What if you want to securely communicate with somebody who you’d rather not give your phone number to? What if you want to securely communicate with somebody who you know on, say, GitHub but lack any other means of communicating with them? For these situations one possible tool that may be of interest to you is Keybase. started off as a service where users could prove their online identities by cryptographically signing and posting proofs to the various supported websites they use. If you knew somebody’s GitHub user name you could search for it on and if they created a page and proved their ownership of their GitHub account you could see their other proven online accounts. With the introduction of the Keybase chat client you can now lookup individuals by their online identities and securely chat with them.

In addition to allowing you to securely communicate with individuals without giving out your phone number, Keybase also offers some additional features such as secure file sharing that we’ll cover.

Leave a Reply