Cybercrime has become a crucial issue for citizens (faced with pishing, hacking), companies (ransomware, data theft) and States. Among these new types of crime and fraud, criminals often use crypto assets to benefit from the anonymity provided by these private contracts. Consequently, in order to respond to the European project, we will endeavour to understand cybercrime, in particular through frauds and swindles on crypto assets but also the use of these contracts for the payment of cybercrimes and the transfer of dirty money between countries. The analysis of these cybercrimes will be the starting point of this research, by approaching cybercrime both in its qualitative dimensions through an in-depth socio-economic expertise of significant cases and in more quantitative approaches using classifications on data collected and processed by computer. The presence in the consortium of members of the police and judicial authorities will make it possible to have access to specific cases. These cases will be analysed by the partners involved (academics and experts involved in the fight) in order to bring out the salient facts about the computer processes used (faulty security protocols, malicious programmes and codes, weaknesses in network security, cryptographic flaws), the intermediaries used (their location, legal personality, function, reputation/anonymity) and the methods of payment (category of crypto assets, passage through tax havens). From this collaborative work, deliverables may emerge that meet a dual requirement: academic excellence and effectiveness in the field of the fight against cybercrime. Finally, this co-production will be part of the eco-system established by Cluster 3 of the Horizon2023 project. The consortium formed will take care to establish links with the projects already underway, in particular the one aimed at understanding the causes of crime. Among the partners, Finance Innovation is a partner in a Horizon 2020 project dedicated to cryptoassets (Infinitech). But more than that, it aims to link up with the 2024 wave, which targets crypto-currencies more directly. The originality of the CRY-CIDER project will therefore be to build, within the European framework, a double collaborative work between (1) the actors of the fight against cybercrime (police and judicial authorities) and the academics involved, and (2) between academic disciplines (computer science, humanities and social sciences). The combination of these complementary European expertise will allow to meet the expectations of the European project: 1) the development of a modular platform to inform, detect, investigate and qualify cyber-crimes, particularly those involving crypt asset; 2) the construction of training modules intended primarily for members of the police and judicial authorities but also for students, users and citizens; 3) the definition of regulatory recommendations and best practices.