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Signal to leave Sweden if backdoor law passes

metayrnc

> The Armed Forces, on the other hand, are negative and write in a letter to the government that the proposal cannot be realized "without introducing vulnerabilities and backdoors that can be exploited by third parties

First time I am seeing an organization against this. Kudos to them for standing up.

diggan

According to the original article (Swedish: https://www.svt.se/nyheter/inrikes/signal-lamnar-sverige-om-...), the reason for the armed forces to be against it is because they recently started advocating for its personnel to start using Signal to reduce eavesdropping, so backdooring Signal would decrease the armed forces security.

> Men Försvarsmakten är negativa och nyligen uppmanade försvaret sin personal att börja använda Signal för att minska risken för avlyssning.

hav

In fact, they are negative because they say that this can't be done without opening up the service to vulnerabilities that could be used by others.

> I ett brev till regeringen skriver Försvarsmakten att lagförslaget inte kommer kunna förverkligas ”utan att införa sårbarheter och bakdörrar som kan komma att nyttjas av tredje part”.

> In a letter to the government, the Swedish Armed Forces writes that the legislative proposal will not be able to be implemented "without introducing vulnerabilities and backdoors that may be utilized by third parties."

diggan

That specific quote is in the original comment of this thread :)

squigz

This was already commented by the original comment in this thread and is not mutually exclusive to GP's comment. What is your point?

giancarlostoro

Makes sense, the entire point of Signal is no backdoors. If you add one, you might as well make the app illegal.

bee_rider

TOR was sort of famously contributed to by a dude in US Naval research early on, right?

They are militaries, not police or intelligence forces. The job is to be ready to do war, not nanny and snoop on civilians (Some of that might be a necessary side effect but it isn’t their reason for being).

tga_d

The NRL originally developed onion routing and Tor. It was then open sourced, stewarded by the EFF for a few years, before becoming its own non-profit. The NRL still do a ton of work on Tor and its ecosystem, primarily through academic research and occasionally code, though the Tor Project is obviously now the biggest player in the space. The original motivation was to enable communicating with covert assets (intelligence services and the like) overseas, which requires lots of non-military cover traffic to be useful, hence the opening up. Its popularity as an anti-censorship tool has motivated a lot of the continued support from various US agencies, including the NRL. Really though, the NRL is a largely civilian institution, and while the people who work there do work for the military, they aren't typically enlisted, have limited security clearance if any, etc. It's sort of like the Navy's version of Microsoft Research, or Bell Labs.

psunavy03

Militaries need intelligence services to be their eyes and ears. That said, most people who are not in their country's armed forces, government, or intelligence service vastly overestimate how much another country's intelligence services actually care about them. Most people aren't that interesting and don't have any intelligence value for another country's government.

red-iron-pine

US Navy research labs developed onion routing and the core of Tor

arguably, one of the reasons it was released to the public was to get large amounts of traffic using onion routing. because if it's just 50 data steams that are entirely ONI or NSA then it's easy to hit them with timing attacks.

but 2+ million streams from all over makes it a lot easier to hide.

dijit

And SELinux was given to us by the NSA.

zaggynl

I question the use of an instant messaging service hosted in another country for your armed forces, is that a good idea, especially now?

As good as Signal is I mean, you will want something under your control.

diggan

They're not using/advocating to use Signal for their military control/communication:

> This week, Brigadier General Mattias Hanson, the Swedish Armed Forces' CIO (Chief Information Officer), decided that calls and text messages that do not concern classified information should, as far as possible, be made using the Signal app. The decision aims to make it more difficult to intercept calls and messages sent via the telephone network.

https://www.forsvarsmakten.se/sv/aktuellt/2025/02/forsvarsma...

Seems people were using SMS for those messages they are now advocating to use Signal for.

Also, seems they've done a review (obviously) but unclear if they had access to something internal from Signal to do the review, feels like they had to:

> The Signal application has been deemed by the Swedish Armed Forces to have sufficient security to make it difficult to intercept calls and messages.

Gud

Any decent military will be using multiple forms of communication systems.

I was a communications specialist for the Swedish Armed forces 10+ years ago, including a tour in Afghanistan and a tour in Kosovo.

We used radio links for internet that I can tell you, were more adversarial than friendly.

The Swedish military is highly capable when it comes to network communications. A small nation will have to think differently.

You could potentially use an instant messaging system in control by someone else, if you are willing and capable of sharing encryption keys with whomever you are going to communicate with beforehand.

Thorrez

Is Signal hosted in just 1 country?

zaggynl

Good question! I assumed it was US only but things have changed a while back after it becoming popular it seems. Going by https://signal.org/blog/signal-is-expensive/

>Because everything in Signal is end-to-end encrypted, we can rent server infrastructure from a variety of providers like Amazon AWS, Google Compute Engine, Microsoft Azure, and others while ensuring that your messages and calls remain private and secure.

Schiendelman

Apple took the same stance during the San Bernardino case!

nickslaughter02

FYI the EU wide proposal to scan all your private messages using an AI agent on your devices also originated in Sweden by EU Commissioner Ylva Johansson in 2022.

> EU Commissioner Ylva Johansson has also been heavily criticised regarding the process in which the proposal was drafted and promoted. A transnational investigation by European media outlets revealed the close involvement of foreign technology and law enforcement lobbyists in the preparation of the proposal. This was also highlighted by digital rights organisations, which Johansson rejected to meet on three occasions. Commissioner Johansson was also criticised for the use of micro-targeting techniques to promote its controversial draft proposal, which violated the EU's data protection and privacy rules.

feanaro

I don't think anything good ever came from Ylva Johansson. Mentions of her name on something should make one automatically treat that thing with suspicion.

EasyMark

is there some fascist movement in Sweden that I haven't heard about?

Release0381

Yeah, the Social Democrats, whose member she is

JmsPae

You know it's a banger proposal when even the Swedish armed forces tells you "Please don't".

bad_user

European armed forces should know best, given that Signal has seen actual use by Ukrainian military personnel, with Russian forces trying their best to target those encrypted communications (right now mostly by getting those smartphones from dead bodies).

mmooss

They also have a social engineering attack using the Linked Devices features, which was on the front page of HN recently.

mrweasel

The fact that proposals like this get this far, without anyone checking with the defence department and actual experts is really weird. It's not just Sweden, this is clearly a problem in many other countries.

I'd really like to know why it's so hard for politicians and police forces to understand that backdoors are dangerous.

mjburgess

It will be waring factions within government (which is never unitary in any country) --- here these laws/proposals/etc. probably come from domestic spying agencies and police forces in most countries. I suspect that signals intelligence agencies and offensive forces have probably mostly moved to "encryption is good" stance given the number of foreign attacks upon domestic assets (gov, biz, etc.).

However, we shouldn't underestimate the desire for foreign intelligence agencies to bait one's own domestic agencies into "spying for them". So i imagine there's some pressure from, eg., the US sigint agencies to have the EU compromise EU citizens in ways that even those very agencies may today not wish to compromise their own.

At a complete guess, I wouldnt be supried if, eg., the NSA (, CIA, et al.) were goading EUROPOL which was demanding domestic anti-encryption laws.

As an empirical matter, encryption makes agencies like EUROPOL's jobs extremely difficult -- i imagine also because they probably struggle to get coop from domestic police forces, so cannot easily do "the physical police work necessary" to get device access.

In the end, I imagine we'll have china to thank for the end to this nonesense -- since any backdoor will immediately be a means of mass corp/gov espionage.

genewitch

> At a complete guess, I wouldnt be supried if, eg., the NSA (, CIA, et al.) were goading EUROPOL which was demanding domestic anti-encryption laws.

The exact purpose of Five Eyes?

I'm shocked, shocked! there's gambling going in here!

codesforhugs

I think it's part ignorance, part exceptionalism. Backdoors sound simple, and if you're thinking about physical backdoors people are generally pretty good at protecting them. That this is largely because they have a lot of characteristics not shared by digital backdoors is easily lost on most people. These folks also tend to believe that THEY will be perfect stewards of backdoors, and anybody who loses control of them is just less competent.

pavlov

They haven’t been in a war since 1814, so they’ve had lots of time to develop other competences.

I hear they also make amazing sourdough and can discuss the Beatles catalog at depth.

bryanrasmussen

as a general rule countries that succeed with a policy of neutrality do so by having their military strong enough that they're mot worth fucking with.

diggan

> having their military strong enough

That's not how Sweden remained "neutral" though, although I'm not sure I'd agree Sweden been neutral since 1814, wasn't exactly neutral before/during the second world war. https://en.wikipedia.org/wiki/Sweden_during_World_War_II

pr337h4m

Signal is headquartered in the US and presumably has no employees in Sweden (and perhaps the entire European Union).

There is utterly nothing the Swedish government can do to stop Signal except for pressuring app stores and/or ISP-level censorship. Preemptive surrender is extremely disappointing, especially for a non-profit - there isn’t even any revenue that can be ‘fined’ by the EU!

Aurornis

> There is utterly nothing the Swedish government can do to stop Signal except for pressuring app stores and/or ISP-level censorship

They can go after executives and employees of foreign companies, too. The charges may not mean much unless those employees travel through Sweden, but if the political winds change in the future then they may be able to convince other countries to enforce their charges against employees as well.

It’s reasonable for a company to avoid risking their employees becoming targets of detention for international travel.

It also more effectively highlights the political issue within Sweden if people there see the consequences of the laws of their elected officials rather than having those laws silently ignored by a company that takes the legal risk upon themselves.

willvarfar

The app stores are run by companies with a presence in the EU.

walrus01

What's funny is that it's other EU laws from totally different parts of government which are, at the same time, pushing to allow for side loading of apps and alternate app stores on iOS and Android.

https://www.google.com/search?q=apple%20eu%20alternative%20a...

The end result of which, if done at large scale, means that an EU government couldn't ban signal, short of forcing all its domestic ISPs to be downstream of a China type great firewall, or simply null route all the IP space where signal's servers are located.

ben_w

All the alternative app stores can easily be subject to the same legal requirements as Apple.

Side-loading is harder to enforce any rules over, of course.

Blocking domains is well-established at this point, thanks to the copyright industry doing a 21.5-year whack-a-mole-waltz with The Pirate Bay. Of course, this also demonstrates the limited effectiveness of domain blocking.

fulafel

You don't need to get Signal from an app store (unless you're on iOS I guess)

itishappy

For 99% of people the effect is the same as blocking the app.

miohtama

In the EU, Apple must support side loading and other app stores.

kjkjadksj

Even then the webapp should work

FromOmelas

Sweden is part of the expanded 5 eyes (now 14 eyes). As a workaround for restrictions on domestic spying, they subcontract their dirty work to each other. Hence, you can expect the US to assist in pressuring them (ostensibly on behalf of Sweden)

diggan

I keep seeing this idea that because a company is headquartered in some place, means they don't have to follow the laws of the countries where they operate.

Yes, Signal may be headquartered in the US, but that doesn't mean they can just ignore the laws of other countries, which is exactly what may happen here, depending on the outcome.

Sweden may propose a backdoor (a utterly shitty idea, I agree) which Signal may decline (which this submission is about). Then the next step is either Sweden giving up on the request, or placing fines on Signal until they comply or outright ban it, or Signal deciding it isn't worth it (prevent Swedish users from using Signal).

All within their capacities and rights, even though I again think it would very stupid approach.

arcbyte

There are only a few instances where institutional powers pass judgements that they cannot enforce. Generally doing so makes that institution look weak because it puts them in a position to have their rulings openly flouted. That's at the core of what jurisdiction means.

Sweden can fine Signal all they want but if they can't enforce the collection, they weaken their power and foster disrespect.

genewitch

Singal is centralized? Can't they just block it at the border? I understand VPN or whatever, but if they're serious I hear there's a couple of countries with "pretty good" border firewalls.

Doing that would eliminate so many Swedes from Signal...

I haven't found a VPN solution for iPhone users in a couple of US states. It's like iphones are actively hostile to the very idea of a VPN. Or at least "self-hosted VPN", maybe the $20/month VPN work but that's... Sketchy.

brookst

Not familiar with Swedish law, but in most of the world the courts have a concept of jurisdiction. Otherwise a small country could just fine Apple $1T and solve its budget woes, and probably build a giant waterslide.

I would be surprised if Swedish law allowed for prosecuting a foreign company with not one bit of operations in the country.

nucleardog

> Otherwise a small country could just fine Apple $1T and solve its budget woes, and probably build a giant waterslide.

You're joining two things here which I think are important to keep separate--the demand and the enforcement.

The Province of Bumbinga can absolutely claim worldwide jurisdiction and fine Apple $1T. And they can fine them a further $1T for every day they're not paid and their waterslide is not built.

Hell, _I_ could send Apple a letter claiming they owe me a trillion dollars so I can build a waterslide.

But when Apple doesn't pay a trillion dollars... then what? Send them angry letters? Still doesn't get the waterslide built.

A legal system's power isn't the orders it's the enforcement mechanism behind it. With a local presence they have the option to seize local assets and bank accounts, forcefully close operations, arrest employees, etc.

When the company has no local presence, your only enforcement mechanism is gaining the cooperation of a foreign country, in which case the country they're headquartered in is very relevant. And they're only going to cooperate if your request aligns with their ideals and generally benefits them.

Except in the most extreme cases, it's generally not worth it to try and impose your rule outside your borders because you have no mechanism to make anyone comply. It's an empty threat. Jurisdiction in the international sense is descriptive not prescriptive. It's recognition of the limits of your authority. The outcome is the same with or without it.

Signal may have users in Sweden which Sweden sees as giving it jurisdiction. Sweden may see it being accessible at all as giving them jurisdiction. Sweden may say "screw it, we have jurisdiction over the whole world!". But their ability to enforce that more or less ends at requiring ISPs to block their traffic or asking the US government to enforce their orders within US borders, so it's kind of a moot point.

TheCapeGreek

> a foreign company with not one bit of operations in the country.

Borrowing from how tax & law is usually applied for companies trading outside of their incorporated country, at least in many places including the EU: If you have users/customers in a certain country, even if your product is purely software, you can be considered to have operations in that country.

walrus01

> I keep seeing this idea that because a company is headquartered in some place, means they don't have to follow the laws of the countries where they operate.

My friend's medium size regional ISP is headquartered in the US and as a hosting company certainly has customers who violate any number of censorship, blasphemy, etc laws in Iran, Russia, Myanmar, Pakistan, Bangladesh, just to name a few.

Signal doesn't "operate" in Sweden any more or any less than any other internet based service which has zero servers, offices, bank accounts or other physical presence in the country.

throwaway28409

> they operate?

How are they operating? It might as well be viewed as citizens of Sweden interacting with a foreign service out of their own volition.

In general, laws are backed up by the threat of violence. To the extent that Sweden's police can't confiscate Signal's assets in the US, they do not have to comply with anything. The only leverage Sweden's government may have is ISP level censorship, which is likely to cause unintended disruptions. Signal is in turn free to attempt to circumvent the censorship.

42lux

While I don't personally agree with the law, I genuinely hope we witness a major corporation withdraw from a market just so we can finally observe the concrete impact of these types of threats. (Even though their position is understandable in this particular case.)

disruptiveink

Google ultimately did that for China. The outcome in that case is that the domestic market filled in the gaps, while complying to all relevant authoritarian legislation. I do not believe that the same would happen for every market where these stunts are being pulled off, at least not to the same level of quality.

Why are European countries trying to pull one off from the China playbook, while simultaneously being shocked that companies react to authoritarian moves in the exact same way as they have done in the past, is beyond me. Is the hubris so large that they honestly can't conceive their "requirements" as being "literally the same as China?"

hx8

Having to build local alternatives probably had a positive impact on China's software industry. We're at a point today that major Chinese software/tech companies are routinely talked about on nightly news.

shalmanese

India banning TikTok did not have the same effect on the Indian software market [1]. The local competitors that cropped up were mostly disappointing and didn't outcompete YT/Instagram.

Similarly, the benefits of Sweden banning Signal would most likely accrue to WhatsApp, not any indigenous software company.

[1] https://restofworld.org/2022/tiktok-sized-hole-in-india/

kdmtctl

China has a user base that could make any app insanely popular. In the single country. Not to mention that EU has less people, EU is also very diverse culturally and the gap keeps widen.

dartos

Would you want to be reliant on American companies right now?

SirHumphrey

Not wanting to be reliant on american companies because of the data and technological sovereignty is admirable.

Not wanting to be reliant on American companies because they don’t allow you to spy on your own citizens as much as you want through…

Havoc

Someone is always willing to bend towards what the market requires - including complying with whatever insanity gov wants

esafak

Let them. If you bend you reduce the options for people who do not want that.

Schiendelman

Have you ever read the book The Corporation? It goes into some detail about why corporations can't do that. Not "won't" - can't.

frontalier

i did not read the book but i did read the news when google gave up on serving censored search results in china

Schiendelman

What would you say the difference is between Google in 2010 in China and Apple in 2025 in the UK?

bramhaag

Unlike a certain big tech giant who pretends to care about privacy until it cuts into their profits.

ragnese

All of them?

bramhaag

Well, only some claim to "remain committed to offering our users the highest level of security for their personal data" while turning off E2EE cloud storage for an entire country.

docdeek

What other choice did Apple have? To ignore the law of a country where you operate just because you don't agree with the law is a terrible standard to set.

null

[deleted]

Schiendelman

What else could they have done?

einpoklum

No, some of them don't even bother pretending they care about your privacy.

ronbenton

What would even be the point of Signal if there’s a backdoor? This isn’t just principled, it’s necessary for business.

genewitch

Once Signal is backdoored successfully (in this alternate timeline) you go after WhatsApp, RCS, whatever other encryption you can't bypass. Other countries follow suit because Sweden did it (like an infamous single study out of the Netherlands that affected global health policy.)

The goal is no privacy. Because terrorism. Or the children. Or espionage. Just pick one and speak against them directly and you'll find many arguments why the government needs access for any of those reasons. People love going to bat for giving up rights.

I forget who said it but you cannot have a civilization without secrets.

throwaway894345

It seems like a lot of these proposals are coming out of Europe—assuming I’m not mistaken (and I may well be), why is Europe cracking down so much on privacy?

diggan

There is a huge section of the population who believes it's possible to strip the security of criminals using apps like Signal without it affecting everyone's security. Same in Sweden as the rest of the world.

The military of Sweden seems to get it at least, they "write in a letter to the government that the proposal cannot be realized "without introducing vulnerabilities and backdoors that can be exploited by third parties"". The military also recently advocated for more use of Signal, so clearly they've reviewed it and find the current security good enough.

kypro

It's not just privacy, Europe is cracking down on freedoms generally. Free speech, the right to silence, the presumption of innocence, etc.

Most of this is being done to address the increasing terrorism threat we now face on a daily basis. Freedoms really only work in societies where people broadly share the same values and cooperate, but European societies are fragmenting and increasingly becoming less safe and less tolerant. If we want to do something about this then restricting freedoms is probably going to be required to some extent.

Another theory I have is that this could just be a symptom of an older and more female voter base. As women become more politically active and as older generations make up a larger share of total voters if we assume these demographics are more safety orientated on average then perhaps we should assume that safety concerns will begin to trump the desire for freedom. It's just a theory though.

account42

> Most of this is being done to address the increasing terrorism threat we now face on a daily basis. Freedoms really only work in societies where people broadly share the same values and cooperate, but European societies are fragmenting and increasingly becoming less safe and less tolerant. If we want to do something about this then restricting freedoms is probably going to be required to some extent.

Or you could undo the changes that have caused that decline in social cohesion. People don't share the same values because our governments have been non-stop importing people with radically different values. Values which see it as a positive to end the lives of those who don't agree.

> Another theory I have is that this could just be a symptom of an older and more female voter base.

That voter base does vote more for the established parties and their policies that have gotten us into this compared to the population at large, yes.

bondarchuk

Glaring example supporting the first hypothesis is that Denmark reinstated blasphemy laws in 2023. https://en.wikipedia.org/wiki/Blasphemy_law#Denmark

nickslaughter02

It's becoming clear that EU politicians are far too easy to manipulate by companies with products to sell.

> Since the revelation of ‘Chatcontrol-Gate,’ we know that the EU’s chat control proposal is ultimately a product of lobbying by an international surveillance-industrial complex. To ensure this never happens again, the surveillance lobbying swamp must be drained.”

https://news.ycombinator.com/item?id=43171861

veeti

Sweden has rapidly devolved from a high trust society to one where firearms and grenade attacks are a weekly occurence [1]. It is the perfect opportunity for law enforcement to demand more surveillance capabilities.

[1] https://la.stnight.in/Sweden/

Gareth321

Step 1: allow a million people from low trust societies to immigrate to a nation of 10 million in a short span of time.

Step 2: Sweden becomes the gun crime capital of Europe.

Step 3: Change your society to a low trust society, dismantling all the wonderful things social services and liberal institutions.

fredsted

European bureaucrats generally have little understanding of the technology they get paid to regulate, as we've seen with the their previous attempts to regulate the industry. It's very much a "vibes-based" approach. They can simply keep proposing the same regulation with a new name until it's voted through.

diggan

> European bureaucrats generally have little understanding of the technology they get paid to regulate

I'd agree with you if you just put "bureaucrats" instead of European bureaucrats, what country isn't currently led by a bunch of bureaucrats who don't seem to understand even the basics of the technology they legislate about?

I've yet to seen a country to lead the way, no wonder the rest of the countries don't seem to know what to do and just throwing stuff at the wall.

throwaway894345

While I generally agree, the bureaucrats in the US have been somewhat checked by nonprofits who will lobby against this kind of legislative overreach and sue if the legislation passes. Obviously we have all sorts of other problems, but mostly our bureaucrats and legislators aren’t making backdoors a policy as far as ai’m aware (who knows what the CIA and FBI and NSA are up to, though?).

I assume it’s just one of those things that Swedish society is having to grapple with abruptly and that they will adapt the appropriate institutions. I have more faith in Sweden than my own country lately.

account42

The politicians voting on it might not fully understand but the people pushing the regulation absolutely do. They want a popultion that hears and sees only what they want to.

tokai

Sweden is having an epidemic of Crime as a Service, where minors are recruited online to do killings etc for cash. Secure messaging makes it very hard to find the leaders of these crimes.

mantas

Bullshit. Crime gangs had myriad of ways to hire youth before. There could be other ways to make sure there’s no huge pool of youth waiting to be hired. But that may be politically too hard.

tokai

Please do your research before throwing that term after me. I don't care if you think its markedly different for crime recruiting earlier. Point is contracts for killings are put online and planned through Signal. The Swedish police find it annoying as it makes it hard to find the money men. That's the reason for why Sweden want the back door. If it makes sense or not has no bearing on what I wrote.

account42

The population in europe is finally (if slowly) waking up to the fact that their elected leaders do not act in their interest. This is the establishment's attempt of staying in control of the narrative so they can keep suppressing any real resistance to their rule.

im3w1l

I can not speak for Europe generally but Sweden has very serious problems with gang wars the last couple years, and people are really tired of them shooting each other and setting off explosives. That's the reason for this particular proposal (and many other questionable expansions of police power too).

nickslaughter02

Just in case you are counting, there's another proposal in France to force backdoors:

> At Tuta, we are deeply concerned about the proposed amendment to the so-called "Narcotrafic" law, which would force encrypted communication providers to implement backdoors for law enforcement. This would threaten everybody’s security and privacy and could be in conflict with European data protection legislation and Germany's IT Security Act. We urge the French National Assembly to reject this dangerous amendment. A backdoor for the good guys only is not possible.

> France is about to amend a bill against drug trafficking, the “Narcotrafic” law, which will force encrypted messaging apps like Signal and WhatsApp to backdoor the encryption for being able to hand over decrypted chat messages of suspected criminals within 72 hours of the request. In order to enforce it, the text provides for a “fine of EUR 1.5 million for natural persons and a fine of up to 2% of the annual world turnover for legal persons”. The amendment has already been passed by the Senate and is now moving fast to the National Assembly.

https://tuta.com/blog/france-surveillance-nacrotrafic-law

mediumsmart

Swedenherald and their 807 vendor buddies value your privacy.

wasmitnetzen

Original article (in Swedish, but the interview with Whittaker is in English): https://www.svt.se/nyheter/inrikes/signal-lamnar-sverige-om-...

throawayonthe

the english interview is actually in the video banner above the page btw

danieldk

What is the state of peer to peer messengers with E2EE? Over ten years ago, Bittorrent Inc. (now Rainberry and Resilio) made a serverless chat client (Bleep IIRC). But I don't think there is anything new that is also user-friendly? (Drop-in replacement of WhatsApp, Signal, iMessage, etc.)

jeroenhd

Peer to peer communications are difficult to combine with mobile phones (at least if you value battery life). There are various messengers out there, but they're incredibly niche and I doubt they'll ever get any decent user bases.

Tox is peer to peer and encrypted, but its UX will probably drive away anyone who wants the ease of use of Signal or WhatsApp.

I think Matrix experimented with the concept of running a server on-device, and that's one of the few alternative chat systems with decent UIs available, but AFAIK that never made it beyond the proof of concept stage.

Veilid Chat, developed by the Cult of the Dead Cow, promises to be an interesting option, but it's currently in beta and has been for a while.

genpfault

> Matrix experimented with the concept of running a server on-device

https://arewep2pyet.com/

Arathorn

On the Matrix side we still want to get back to working on this; it's just needs dedicated funding.

undotoday

Jami is supposed to be encrypted, distributed, opensource, and cross platform, though I haven't personally used it:

https://jami.net/

timbit42

Session, SimpleX, Jami, Briar are a few.