Sousa, J., Sousa, A., Sales, S., Evaristo, B., & Ávila, I. (2026). Decentralized Authentication Model for Smartphone Calls Based on Verifiable Credentials and Blockchain. In Proceedings of the 9th Blockchain Workshop: Theory, Technology and Applications, (pp. 57-69). Porto Alegre: SBC. doi:10.5753/wblockchain.2026.22979