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good Vietnam
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Welcome to Vietnam Bitchat geohash #w6ugq5 🇻🇳

The problem with nostr is the storage capacity too small . There are a little nostr node can store media. So the DOS attack will come to

Not your open hardware and firmware, not your privacy 😂

02bf66bd45e5114821b7a0dd70549b77b0a4f13b66e1c50179f12900dc07b0f09f

Replying to Avatar OpenSecret

Announcing: Harbor, an ecash desktop wallet for better bitcoin privacy.

https://blog.mutinywallet.com/harbor/

Privacy for the common person is a value worth fighting for. When we see a lack of freedom tools, we must build them into existence. They don't appear on their own.

Much has been said about privacy at the Bitcoin protocol level. For now, we build it on higher layers where we can be more nimble.

Ecash is a tool available today that combines with Bitcoin to bring new levels of common privacy. Cashu and Fedimint are two existing implementations we're interested in.

Harbor Privacy: All communication runs over Tor. Mutiny is not in the middle of any connections or transactions. Funds in the wallet get a Privacy Score to show how the mints provide privacy over time. More to come on this in the future.

Harbor Multi-mint: Instead of relying on a single mint with your funds, spread the risk over dozens or more. Harbor manages this for you, showing you a single balance while connecting with mints for you. A mint can go offline with minimal impact on you.

Harbor Automation: Running as a desktop app unlocks ability to do long running processes in the background. Move money in and out of mints on your preferred schedule to maximize your desired level of privacy. Harbor makes suggestions, but you are in control.

Move money in and out of Harbor using Lightning or on-chain. We love Bitcoin, and we love privacy. We hope Harbor gives everyday people more privacy and peace of mind.

Great!

With ecash stamp , the idea from nostr:npub1h0uj825jgcr9lzxyp37ehasuenq070707pj63je07n8mkcsg3u0qnsrwx8 , we can solve many economic model for information structures

Replying to Avatar Keychat

Good question.

Simplex chat also use signal protocol to achieve end to end encryption.

https://github.com/simplex-chat/simplex-chat/blob/stable/PRIVACY.md

"Simplex chat is the first messenger without user IDs. " This is its most distinctive feature.

“To deliver messages, instead of user IDs used by all other platforms, SimpleX uses temporary anonymous pairwise identifiers of message queues, separate for each of your connections — there are no long term identifiers.”

In my view, Keychat's method of changing the sending and receiving addresses for almost every message is more beneficial for metadata privacy.

I think the number of Simple Chat relays is fewer than the number of Nostr relays. Moreover, the Simplex Chat team has not aimed to integrate with Bitcoin in any way. Could it be said that Simplex Chat does not yet have a viable economic model?

Could it be said that Simplex Chat does not yet have a viable economic model? Sure . Not have a viable economic model

With ecash stamp , keychat will be maintained at best . We hope the nostr relay can use ecash stamp soon

Great letter 4.0 system

nostr:note16gv0dfkfaj2cvyujxlk9thckm4vy63r9vl0hpcn9473flca9qqqscm583q

Replying to Avatar Keychat

When we started conceptualizing Keychat, we aimed to design a chat application that surpasses Signal. Our design process was divided into four steps.

First, Keychat addresses issues of user sovereignty. It opts to use Nostr public keys as IDs and Nostr relays for message transmission. Users fully own their IDs, which are not registered on any server. They can choose which relays to use.

Second, Keychat aims to solve the security issue of message encryption by implementing end-to-end encryption that ensures both forward secrecy and backward secrecy. Keychat implements the Signal protocol (X3DH and the Double Ratchet algorithm) on the client side without the need for a coordination server. Existing Nostr relays only need to handle the transmission of encrypted messages.

Third, Keychat tackles the problem of metadata privacy. A major issue with original Nostr DMs is that metadata is not only exposed to relay operators but also to other users. Keychat separates the sending address and receiving addresses from the ID, updating these addresses for almost every message. Thus, each Keychat message is nearly independent.

Lastly, Keychat addresses the issue of user payments and relay charges. Since each message is not linked to an ID, traditional payment models are not feasible. Initially, we thought of having relays issue one-time anonymous access tokens that users could purchase and use for anonymous pay-per-use. Later, we realized that using Bitcoin ecash as postage for messages would be a better solution.

Ultimately, we designed a chat application where users maintain sovereignty, messages are securely encrypted, metadata privacy is preserved, and the economic model is straightforward and reliable. nostr:note1kr8nvdlhz207rq6z300xy6qylf9mmpgjxgfq6925vkez4f3ej3gqh5f0te

SimpleX ?! What s different?