The 53rd Annual IEEE/IFIP International Conference on Dependable Systems and Networks (DSN) 2023 (https://dsn2023.dei.uc.pt) was organized by SSE members Henrique Madeira and Marco Vieira as General Chairs. Over the years DSN has become a forum to present the best world research in the fusion between dependability and security research, understanding the need to simultaneously fight against accidental faults, intentional cyber-attacks, design errors, and unexpected operating conditions.