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Millions trust Signal to keep their conversations private. The same should be true for payments. Signal deserves a payment experience that’s just as private and instant. Powered by Bitcoin – the native currency of the internet. So we built it. πŸ‘‰ bitcoinforsignal.org Sending money to friends should be as easy and private as sending a message. Our developers imagined what Bitcoin inside Signal could feel like. We integrated Cashu into the iOS and Android Signal apps, delivering a beautiful experience that protects user privacy end to end. Back in 2021, Signal integrated MobileCoin. It stayed niche, speculative, and largely unknown to most users. As the most widely adopted cryptocurrency, Bitcoin is ideal as the backbone for the new global economy. #BitcoinForSignal Using the Cashu protocol, a Chaumian ecash system that provides strong privacy, Signal users can send and receive Bitcoin micropayments instantly. The Cashu Signal integration doesn't compromise Signal's privacy guarantees. Your messages are private. Your payments should be too.

Replies (61)

Would you really suggest to bring cashu, in its current development stage, to a platform with millions of mainly normies? I like cashu but that seems not right to me. Maybe something like the approach of #zeus could fit better, but I'm afraid that even this is too much. If you have to manage the swaps by yourself. But the approach of zeus with automatic swaps in the background, cashu -> lightning -> onchain with preset thresholds. Which can be adjusted by users when needed, maybe could be possible. Sending Bitcoin, no matter to which address, onchain lightning or chashu or whatever must be managed by the app. When normies want Bitcoin, they expect that everything works out of the box. Ideally better that their legacy banking experience. You don't need to explain them the differences of onchain or lightning. THEY JUST DONT GIVE A SHIT. And that is ok. If we want Hyperbitcoinization we have to built tools that the market wants or could like with features like privacy or/and anonymity that we all need. Trojan Horse approach. And please keep on doing your amazing work πŸ™‚ Just my two sats ✌️
I would not call it a distraction. But maybe it could be one tool of many to build a product of later. There need to be development like this. We must not forget that there is a huge difference between the normies world and the Bitcoiners world. If we build for Bitcoiner, it can be nerdy and kind of reckless because of testing etc. But if you want to build for normies world you have to make the app as easy to use as possible especially when dealing with money. There must be double or triple nets that the dumbest user cannot get rekt by the app, other than doing dumb transactions, which are users faults. But if he changes his phone and did not write his seed phrase down, there must be a way that he can get his wallet back. Without a big workaround. He then does not want to hear that he should have wrote down his seed phrase. This is what the user expects from every banking app. He gets a new phone, logs in and there is his money. At least we have to achieve this user experience. Otherwise there is no reason to switch to Bitcoin for normies. I think we even would damage bitcoins reputation for the normies when one after another loses his funds because of not writing down the seed phrase or a mint rug pulls or what ever.
I agree with everything you say. I just think that River link , for example, is a much more appropriate solution, while Cashu serves as a distraction. Aside from being technically impressive and complex, it misses the point. By the way, @npub1uq70...u0c2 are excellent and the right approach to using mints because they are, by design, distributed. The entire product is built in a way that clearly defines the trust involved and the social aspects of the mint guardians, extending into the physical world. Cashu is a distraction because it creates a lot of noise and shifts attention away from Fedimints and genuine solutions like River link.
Thanks for sharing. First time I hear from river link. I read the page but did not get every relevant info here. Do I have to do KYC to send river links? Do I need an river account or a wallet on river to send river links? If yes, is the river wallet self custody? I guess the wallet is custodied by river and thats why they can handle every wallet address (lightning/onchain) you want to send Bitcoin to. But now I get your point about distraction. You are right, some topics get too much attention while other good stuff is pushed into the shadows.
Not really messaging right now, but still looking for a family internal chat solution. There has been some development on #nostr, like 0xchat, and we also have experimented with Delta Chat in the past. πŸ€” https://delta.chat/
Centralized Infrastructure: Signal relies on centralized servers controlled by the Signal Foundation. This creates a single point of failure or control, unlike decentralized alternatives (e.g., Matrix). If servers are compromised or coerced, metadata or service could be affected. Phone Number Requirement: Signal requires a phone number for registration, which can link accounts to real-world identities. This raises concerns for users seeking full anonymity, as phone numbers can be traced or requested by authorities. Limited Anonymity: While messages are end-to-end encrypted, Signal collects some metadata (e.g., phone numbers, contact lists if shared, and last activity timestamps). Though minimal compared to other apps, this metadata could theoretically be accessed under legal pressure. U.S.-Based Nonprofit: The Signal Foundation is based in the U.S., subject to U.S. laws and potential government surveillance (e.g., NSL demands). Some users distrust any service under U.S. jurisdiction due to historical surveillance programs like PRISM. Proprietary Server Code: While Signal’s client-side code is open-source, the server-side code was historically closed-source (though it’s now open). Some users remain skeptical about what happens on the server side, despite encryption protections. Funding Concerns: Signal is funded partly by donations and grants, including from the Open Technology Fund, which has ties to U.S. government programs. This raises suspicions for some about potential influence or backdoors, though no evidence supports this. Dependence on Third-Party Services: Signal uses services like AWS or Google Cloud for infrastructure, which could be subject to third-party data requests or vulnerabilities outside Signal’s control. Lack of Full Audit Transparency: While Signal’s encryption (Signal Protocol) is audited and trusted, some argue the app’s overall system (including updates and server operations) lacks frequent, comprehensive public audits, leading to skepticism about implementation flaws. Feature Creep: Recent additions like group calls, stories, or payment features (e.g., MobileCoin integration) worry some users that Signal might stray from its privacy-first mission, potentially introducing vulnerabilities or bloat. Social Pressure and Adoption: Some distrust Signal due to its association with activists or whistleblowers, fearing it might attract targeted surveillance. Conversely, others worry about its growing mainstream adoption, which could lead to commercialization or compromises.
ty for your time and this thorough response. All I have heard the downside of Signal have been confirmed by your response. I have been using Signal for a while now that I cannot remember when I started using it. But I started it before decentralisation became a thing or even became mainstream. However, I am always in a look out for new privacy app that is amnesiac, encrypted at rest and on transit with no meta data. But then maybe I am asking too much. ☺️
You better read this before you use #Signal There are no "free messenger" in this world. Forget WhatsApp, SignalApp, Telegram ! If you want a really secure messenger which stores nothing from you and can be used 100% anonymous, then check out Threema.com
What’s your opinion of @Signal and its connections with three letter agencies, @calle, @npub1mhcr...c226, @Derek Ross, @npub1zqsu...cqrs and @npub1vt77...5vdp? #asknostr The β€œSignal facing collapse after CIA cuts funding” article popped onto my radar after @calle broadcasted it on nostr. https://english.almayadeen.net/articles/analysis/signal-facing-collapse-after-cia-cuts-funding
This is a brilliant step toward aligning communication privacy with financial sovereignty. Signal already proved that secure, censorship-resistant messaging is possible β€” adding Bitcoin via Cashu takes that same principle to the realm of value exchange. What’s remarkable here is that Cashu applies Chaumian ecash principles β€” meaning transactions are blinded and unlinkable, preserving privacy even from the mint itself. That’s a level of protection unmatched by most on-chain or Lightning solutions today. If Signal ever officially embraces this, it could become a blueprint for the future of digital autonomy: encrypted words and encrypted money, side by side. In a world where surveillance capitalism monetizes both data and finance, this is the direction true freedom must take.