Research, essays and open tools by pSacramento on Bitcoin privacy, Lightning, Pix and digital payments, built from hands-on UX research.

As I explained in my previous post, I became very concerned after seeing Lightning payments being made publicly visible in Tether Wallet. The core issue is simple: people may be using these Lightning wallets for privacy-sensitive payments without realizing that their transactions can be made publicly accessible. In some

Tether’s new wallet routes Lightning payments through Spark, which exposes transaction details publicly and undermines the privacy of Lightning. The current setup misleads users by failing to communicate this clearly.

My background is in UX design. I know how to think about user flows, how to make things feel right, how to design something people actually want to use. What I don't have is a background in full-stack web development. This lack of knowledge has always prevented

Privacy was not a priority when developing the payment system Pix. What can we learn from this?

What are the lessons that the Bitcoin community can learn from the Brazilian experience with the adoption of the Pix?

This proposal outlines a Field Study in Kenya to explore the potential of Fedi to improve the operations of informal cooperative groups, commonly referred to as Chamas, in the country. Introduction The federated eCash platform Fedi offers versatile solutions that can address various challenges across different scenarios. Following extensive research

In this article, I will address one potential danger of browser-based wallets called domain spoofing. More specifically, I want to use Mutiny to give a practical example of the risks of a specific type of domain spoofing called a homographic attack.

I am excited about Nostr, a new technology, but also concerned about missing features like "delete" and automatic removal of metadata. Developers should inform users and provide tools to protect privacy.

In this article, I argue that one of the main reasons for bitcoin's success dwells on something that resonates with us humans on a much deeper level: the primal elements of its brand, which combined turn it into a belief system.

What are the biggest challenges to the improvement of the UX of bitcoin products?