I use Threema and would recommend it! -Katie ________________________________ From: Scott Murphy via linux <linux [ at ] linux-ottawa [ dot ] org> Sent: Saturday, December 7, 2024 2:18:56 PM To: Linux-Ottawa <linux [ at ] linux-ottawa [ dot ] org> Cc: Nash JC - NCF <nashjc [ at ] ncf [ dot ] ca> Subject: Re: [linux] Secure messaging? Attention : courriel externe | external email I'm no judge of these apps, however a number of my remote friends use signal for this type of thing and I'm a user as well. I was introduced to it around the time of the Snowden revelations at a conference and have been using it since for talking to a small set of people, mostly because we can, not because of any special requirement. It is cross platform, however it is designed for a smart phone to get it started. After that, you can use desktop applications. https://signal.org On 2024-12-07 11:50, Nash JC - NCF via linux wrote: These scenarios are important ones. One thing I've found with my own "emergency" tools is that they aren't used enough so that they are up to date with other software and hardware changes. That means that the tools have to be also part of regular usage streams, even if somehow isolated from regular use. Or else there has to be a regular test message, but that gets into the same problem the cell phone "colour" alerts have. My wife and I think you could get elected with 95% of the population if you promised (name your favourite TV program) would not be interrupted by the awful noise to let you know some kid on the other side of Ontario ran away from home. For us, it's that Jeopardy answer we want to hear. JN On 2024-12-07 11:16, rob [ at ] echlin [ dot ] ca<mailto:rob [ at ] echlin [ dot ] ca> via linux wrote: Let me oopsify. I asked what tools people here recommended for encrypted messages "for personal use". But I confused the issue by first asking if we wanted a secure messaging solution for this group. Sorry! One scenario: I would like to connect securely using my phone (text for sure) with security people that I know on the webs, or in a security consulting firm. Another scenario: Connect (text, maybe voice) to outside security people and co-workers during a security incident, when my work email and my whole work machine, could be assumed pwned. On 2024-12-07 09:10, Jean-Francois Messier via linux wrote: Let's remember this is a public list. If one wants to do secure messaging, this is usually to a restricted list of recipients, each with their own public key, regardless of the encryption or security software. About having a shared keypair, the key is no more public. And to encrypt the message to each and every of us, either the sender has all public keys, or the mail relay has the ability to decrypt the received message, and re-encrypt it to each and everyone individually on the list. As for verifying the authenticity of a given email, this means that everyone has to sign it, and that anyone who wants to verify the signature of a given message, the recipient needs to have the public key of the sender, as well as some trust in this public key, beyond just downloading it from a key server. JFM On 2024-12-06 20:42, rob [ at ] echlin [ dot ] ca<mailto:rob [ at ] echlin [ dot ] ca> via linux wrote: Hi Re: "China-linked attacks on U.S. telecom networks" Do we want to have a secure messaging solution for this group? Is there a preferred encrypted messaging solution for personal use? Tom's Guide has a report that seems useful. https://www.tomsguide.com/reference/best-encrypted-messaging-apps Thanks! Rob To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org<mailto:linux+unsubscribe [ at ] linux-ottawa [ dot ] org> To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org<mailto:linux+help [ at ] linux-ottawa [ dot ] org> To visit the archives: https://lists.linux-ottawa.org To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org<mailto:linux+unsubscribe [ at ] linux-ottawa [ dot ] org> To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org<mailto:linux+help [ at ] linux-ottawa [ dot ] org> To visit the archives: https://lists.linux-ottawa.org To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org<mailto:linux+unsubscribe [ at ] linux-ottawa [ dot ] org> To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org<mailto:linux+help [ at ] linux-ottawa [ dot ] org> To visit the archives: https://lists.linux-ottawa.org -- Scott Murphy