Towards a Secure and Transparent Blockchain-Based System for e-Commerce Deliveries. - Anastasia Theodouli; Evdoxia Manganopoulou; Athanasios Kalfoutzos; Athanasios Tzikas; Christos Tsislianis; Dimosthenis Ioannidis; Konstantinos Votis; Dimitrios Tzovaras (SecITC, 2023)