In part 3 and part 4 of this series I described a privacy centric covid-19 tracking app protocol. This time I will try to compare it “Part 3+4” with other existing protocols out there. My aim is to set the bar high for privacy for such apps. If the privacy…

In part 3 of this blog series I sketched a system for tracing virus infections with minimal data leaked. The goal is still to let people warn each other about possible infection, but not give any clues to who has the infection or who is being warned. …

I am trying to design a virus infection tracking system that does not leak any information. This third attempt uses linked ring signatures to hide the identity of the participants. I compare the privacy of many tracing apps to this approach in part 5 of this series. This is the…

This story has largely been superseded by a third revision of a protocol, described in part three of this series. If you are only reading one of the stories, I suggest rather reading that one. In the first part, I described a design for a system to track covid-19 with…

I published a new story about an improved scheme for infection tracking here. Note: I am an amateur in this stuff, just doodling away. You might find people with better insight into this issue elsewhere I was thinking about the ultimate covid-19 infection tracing app, and how to preserve privacy…

Nordnorgebanen Det er stadige opprop om at tiden er kommet for å bygge Nordlandsbanen videre i Finnmark. Et av hovedargumentene er kutt i CO2 utslippene. En kjapp hoderegning er at hvis vi sparer de 100.000 tonn CO2 utslippene årlig med toget, vil driving av anlegget gå karbon nøytralt om ca…

Mot en ny modell for bompenger Problemet med bompenger et at de blander sammen to ting. Først ønsker man å begrense trafikken og fordelsbehandle de som kjører kollektivt. Så ønsker man å finansiere veiprosjekter. Med dette forslaget får myndighetene et verktøy til å skille de to fra hverandre. Inbyggerene får…

Amoveo is a new blockchain project featuring programmable state channels, on-chain oracles, financial derivatives and more. In this post I will look at the way smart contracts in channels are implemented, which is quite different. So start by forgetting everything you know about programming smart contracts for other blockchains. This…

A new blockchain will require a way of determining consensus. Proof-of-work mining is one popular way of solving this. Block rewards are given to a miner that solves a puzzle of some sort, ant that miner is entitled to make a new block. This is also a way to distribute…