Blockchain Papers

Anna Piotrowska

The appearance of bitcoin is the beginning of a new era in which advanced technological capabili- ties have changed the perspective on the financial system's functioning rules and have expanded the understanding of the category of money. Bitcoin is used in commercial transactions, transfers and as an investment asset. The establishment of bitcoin is a part of the movement away from cash transactions and the general acceptance of non-material form of money observed around the world. The aim of the study is to analyse the bitcoin cryptocurrency in the scope of the fulfilment of the definition criteria and functions of money formulated in an economic theory, and to present the current legal situation in selected countries relating with its functioning.

Kevin Dowd

No abstract is available for this record.

Łukasz Dopierała, Adam Borodo

No abstract is available for this record.

Nicolas Houy

It is a widely spread belief that crypto-currencies implementing a proof of stake transaction validation system are less vulnerable to a 51% attack than crypto-currencies implementing a proof of work transaction validation system. In this article, we show that it is not the case and that, in fact, if the attacker's motivation is large enough (and this is common knowledge), he will succeed in his attack at no cost.