Bitcoin Magazine

Spark And Ark: A Look At Our Newest Bitcoin Layer Twos

A comparison of the trust models and trade offs of Ark and Spark, the two newest entrants to Bitcoin's collection of Layer Two protocols.

View quoted note →

Does the Arkade wallet use the Nostr nsec format for its private key? View quoted note →

The counterparty risk of holding Cashu-mint–issued ecash sats is proportional to the holding time. The longer you hold ecash sats issued by a Cashu mint, the greater your counterparty risk. When a user wants to send 10,000 Cashu ecash sats to a friend for better privacy and convenience (without needing the recipient’s address), Keychat Wallet can combine the minting and sending of Cashu sats into a single operation instead of maintaining a continuous 10,000-ecash-sat balance. This reduces the time the user holds the ecash sats. Thus, the Cashu mint is better used as a privacy-preserving bridge rather than for secure long-term storage. View quoted note →

Imagine Keychat Wallet supporting both an Ark wallet and a Cashu wallet. Most funds would be kept in the Ark wallet, while the Cashu wallet balance would be automatically kept at 1,000 sats. If the Cashu balance drops below 1,000 sats, Ark sats would be automatically converted into Cashu sats; if it rises above 1,000 sats, Cashu sats would be automatically converted back into Ark sats. That way, a user’s maximum loss from a Cashu mint failure would be limited to 1,000 sats. View quoted note →

Great to see Japanese users starting to use Keychat. 日本のユーザーがKeychatを使い始めてくれて、とても嬉しいです. View quoted note →

Postal systems use stamps to deter spam and raise revenue. Ecash sat is the best digital stamp because it’s a anonymous bearer token — essentially a piece of data. Like a physical stamp that sticks to an envelope, a digital stamp can be attached to a message. A message relay can function as a digital post office, deterring spam and generating revenue by requiring digital stamps. View quoted note →

Testing Nostr Badges in Keychat Browser. View quoted note →

Testing Bloomapp in Keychat Browser. View quoted note →

Keychat — KC.

If you’d like to share your feedback, just click the link on our profile page. You can also add your Keychat link to your profile so others can easily reach you on Keychat.

Because 👇 View quoted note →

Keychat’s built-in browser makes exploring Nostr web apps effortless—your ID and wallet are already set up and ready to use. View quoted note →

View quoted note →

Keychat Browser uses the Keychat Wallet to top up BTC for the PayPerQ mini app, which is very simple and intuitive.👇

View quoted note →

If you want to understand the design philosophy of the Signal app, there’s no better resource than the blog post written by Signal’s founder, Moxie. It’s difficult to modify the Signal app, but you can easily use the Signal protocol. "One of the controversial things we did with Signal early on was to build it as an unfederated service. Nothing about any of the protocols we’ve developed requires centralization; it’s entirely possible to build a federated Signal Protocol-based messenger, but I no longer believe that it is possible to build a competitive federated messenger at all."

Signal Messenger

Reflections: The ecosystem is moving

At Open Whisper Systems, we’ve been developing open source “consumer-facing” software for the past four years. We want to share some of the t...

For us as Bitcoiners, developing Keychat is the greatest contribution we can make to Bitcoin. View quoted note →