Search Results for: ic

To ensure good code quality, we are looking this week at some golang (one of the language used for many of our project at C4DT) helping us to do so. Some idea where taken from the Awesome Go List, a good reference for everything related to golang. First, we show some “classic” golang tools used (…)

Using typescript and npm has two big advantages: there are many modules available, and it runs in many environments. Unfortunately this is also one of the biggest challenges. Because you can configure every aspect of the system, you can break it very easily. At C4DT we often use the crypto library, or the crypto-browserify counterpart. (…)

In a systems infrastructure, it is common that a single physical hosts presents many different services to the world. For example, one can have https://app1.my.domain/ and https://app2.my.domain/ point to the same host, whereas the actual services inside the organization reside on different physical or virtual machines. A typical way to handle this is to use (…)

From an engineering point of view, quantum computers are very interesting beasts. It’s something new, shiny, you don’t understand it, but it seems to be the future. So you must go there! This is a collection of links that I found very helpful in understanding how quantum computers work and what they can do. First (…)

Calypso is an auditable data-management framework that allows decentralize sharing and life-cycle management of private data. It is describe in this paper: https://eprint.iacr.org/2018/209.pdf. We use Calypso to store private data on the blockchain. DARCs describe the access to this private data. We use it in an example game of rock-paper-scissors in our example mobile application. (…)

C4DT is working on bringing software from the labs to the real world. As part of this effort, we’re working on implementing use-cases for OmniLedger. OmniLedger is a novel blockchain that offers several new features. For example it works as a decentralised login service. This means that there is no central service deciding on who (…)

Current access rights management systems always depend on a centralized authority that all members must trust. However, for blockchains, this is not a good solution. Blockchains are decentralized and cannot easily use centralized trust systems. We built DARCs, a group-management on steroids that allows decentralized administration and delegation of identities. It is used in the (…)

Every week at our engineers-meeting we have a short presentation of _anything_ we found on the internet that is somewhat work-related and that we would like to share with our fellow engineers. As the team-lead, I wanted to do some short team-building exercise, and I thought about the game “The Mind”. It is a collaborative (…)

The C4DT Factory works using software produced by the EPFL IC labs. Our focus is on software that increases digital trust in the era of the internet. One area where we see a lack of trust is account management, which includes the following elements: self-sovereign management of the account using the account to login to (…)

The DEDIS lab at EPFL worked on a novel blockchain system called OmniLedger. It uses Calypso to provide decentralized access control including secure storage of data on a blockchain. This combination has the following characteristics: OmniLedger builds on byzcoin, a permissioned, public blockchain which uses little energy. Contrary to other permissioned blockchains, it still allows (…)

For a bit more than three years, DEDIS has been working on a blockchain based on the byzcoin paper. The groundwork has been laid to add client interactions, first as a number of command line interfaces, then a first web-interface, a second interface added by C4DT as a demonstrator, and now, finally, a mobile app (…)

When working on the command line, it is common to build complex commands that connect sub-tasks through the pipe. In those situations, it can be useful to have an idea of the data transferred between two connected processes. For example, what is the throughput? What about the volume of data transferred? Enter pv. You can (…)

Most projects need organization. There exists a bunch out there, from the post-its laying on the desk to a huge kanban spanning the whole chain of supply. With code¸I find using the same layout as the project is pretty practical: when digging deeper inside it, you get more relevant information, tagging these closer to the (…)

The Center for Digital Trust is always searching for novel ways to decentralize control of users accounts so we don’t have to rely on a centralized structure that can be abused by administrators. Currently we have three kinds of services that we offer to our partners: A matrix.c4dt.org installation for internal discussions Our demo.c4dt.org demonstrators (…)