Support for pseudonymity in online table games

• Autor(a) principal: Mota, Diogo Martins
• Data de Publicação: 2022
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10773/35781
• topic: Anonymity; Collusion; Online games; Pseudonyms; Sybil attack; Table games

Online gaming is an interesting way to bring players together from various locations without the need for physical presence. But it raises several security issues, one of them being the possibility of collusion attacks. Such attacks can involve different players working together for a common goal or a single player using multiple accounts (an attack called Sybil, or self-collusion). One way to combat collusion attacks is to prevent players from knowing whom they are playing with. However, this means that players must be anonymous to others. This would require that even some kind of long-term pseudonym could not be presented to other players, because it could be identified by possible Sybil attackers. To solve this problem, we implemented an architecture with Sybil attack prevention in mind. To create an architecture capable of accomplishing our goal, a system that has anonymity when matching via pseudonym but can also hold valuable data of the players was necessary. Using pseudonyms, both long and short-term, to counter Sybil attacks (keep Sybil attacks at a minimum) was the idea to avoid forced matches between players.