De-Authorizer: Uma Arquitetura Baseada em Blockchain para Revogação Descentralizada de Acesso a Dados em Redes Sociais Online
Resumo
Redes Sociais Online (RSO) centralizam o controle de dados pessoais, dificultando a revogação de consentimento exigida pelo GDPR e pela LGPD . Este trabalho apresenta o De-Authorizer, uma arquitetura baseada em blockchain para revogação descentralizada de acesso a dados, auditável e centrada no usuário. A proposta preserva os modelos de monetização das RSO e integra contratos inteligentes a ACLs e OAuth 2.0. Para garantir privacidade e escalabilidade, adota-se uma arquitetura de blockchain híbrida (on-chain/off-chain). A arquitetura foi desenvolvida segundo o Design Science Research Framework. A avaliação em rede permissionada Proof of Authority, com até 70.000 usuários, atingiu 3.214 TPS e 7,75 s de latência média, demonstrando viabilidade prática.
Palavras-chave:
Blockchain, Revogação de Consentimento, Controle de Acesso, Redes Sociais Online
Referências
Bataineh, A. S., Mizouni, R., Bentahar, J., and El Barachi, M. (2020). Toward monetizing personal data: a two-sided market analysis. Future Generation Computer Systems, 111:435–459.
Camilo, G. F., Campista, M. E. M., Costa, L. H. M., and Duarte, O. C. M. (2022). Disponibilizaçao segura, automática e confiável de dados proprietários utilizando corrente de blocos. Revista Eletrônica de Iniciação Científica em Computação, 20(3).
Campanile, L., Iacono, M., Marulli, F., and Mastroianni, M. (2021). Designing a gdpr compliant blockchain-based iov distributed information tracking system. Information Processing & Management, 58(3):102511.
Davari, M. and Bertino, E. (2019). Access control model extensions to support data privacy protection based on gdpr. In 2019 IEEE International Conference on Big Data (Big Data), pages 4017–4024. IEEE.
Fiege, U., Fiat, A., and Shamir, A. (1987). Zero knowledge proofs of identity. In Proceedings of the nineteenth annual ACM symposium on Theory of computing, pages 210–217.
Fotiou, N., Pittaras, I., Siris, V. A., Voulgaris, S., and Polyzos, G. C. (2019). Secure iot access at scale using blockchains and smart contracts. In 2019 IEEE 20th International Symposium on”A World of Wireless, Mobile and Multimedia Networks”(WoWMoM), pages 1–6. IEEE.
Frimpong, S. A., Han, M., Boahen, E. K., Sosu, R. N. A., Hanson, I., Larbi-Siaw, O., and Senkyire, I. B. (2023). Recguard: An efficient privacy preservation blockchain-based system for online social network users. Blockchain: Research and Applications, 4(1):100111.
Gabizon, A., Williamson, Z. J., and Ciobotaru, O. (2019). Plonk: Permutations over lagrange-bases for oecumenical noninteractive arguments of knowledge. Cryptology ePrint Archive.
Gramoli, V., Guerraoui, R., Lebedev, A., Natoli, C., and Voron, G. (2023). Diablo: A benchmark suite for blockchains. In Proceedings of the Eighteenth European Conference on Computer Systems, pages 540–556.
Guidi, B. (2020). When blockchain meets online social networks. Pervasive and Mobile Computing, 62:101131.
Holmes, A. (2021). 533 million facebook users’ phone numbers and personal data have been leaked online.
Hu, V. C. and Hu, V. C. (2022). Blockchain for access control systems. US Department of Commerce, National Institute of Standards and Technology.
Li, R., Shen, C., He, H., Gu, X., Xu, Z., and Xu, C.-Z. (2017). A lightweight secure data sharing scheme for mobile cloud computing. IEEE Transactions on Cloud Computing, 6(2):344–357.
Mendoza-Tello, J. C., Mora, H., Pujol-López, F. A., and Lytras, M. D. (2018). Social commerce as a driver to enhance trust and intention to use cryptocurrencies for electronic payments. Ieee Access, 6:50737–50751.
Peffers, K., Tuunanen, T., Rothenberger, M. A., and Chatterjee, S. (2007). A design science research methodology for information systems research. Journal of management information systems, 24(3):45–77.
Pinno, O. J. A., Gregio, A. R. A., and De Bona, L. C. (2017). Controlchain: Blockchain as a central enabler for access control authorizations in the iot. In GLOBECOM 2017-2017 IEEE Global Communications Conference, pages 1–6. IEEE.
PRAVALLIKA, G., RAO, C. P., and DEEPIKA, Y. V. S. (2025). A block chain-based security sharing framework with fine-grained access control for personal data. Stanford & Oxbridge Journal of Emerging Science and Computing Intelligence (SOJ-ESCI), 5(2):29–37.
Shukla, S., Bisht, K., Tiwari, K., and Bashir, S. (2023). Data Economy in the Digital Age. Springer.
Wang, Y., Li, S., Liu, H., Zhang, H., and Pan, B. (2022). A reference architecture for blockchain-based traceability systems using domain-driven design and microservices. In 2022 29th Asia-Pacific Software Engineering Conference (APSEC), pages 269–278. IEEE.
Yang, F., Wang, Y., Fu, C., Hu, C., and Alrawais, A. (2020). An efficient blockchain-based bidirectional friends matching scheme in social networks. IEEE Access, 8:150902–150913.
Zhang, S., Yao, T., Arthur Sandor, V. K., Weng, T.-H., Liang, W., and Su, J. (2021). A novel blockchain-based privacy-preserving framework for online social networks. Connection Science, 33(3):555–575.
Camilo, G. F., Campista, M. E. M., Costa, L. H. M., and Duarte, O. C. M. (2022). Disponibilizaçao segura, automática e confiável de dados proprietários utilizando corrente de blocos. Revista Eletrônica de Iniciação Científica em Computação, 20(3).
Campanile, L., Iacono, M., Marulli, F., and Mastroianni, M. (2021). Designing a gdpr compliant blockchain-based iov distributed information tracking system. Information Processing & Management, 58(3):102511.
Davari, M. and Bertino, E. (2019). Access control model extensions to support data privacy protection based on gdpr. In 2019 IEEE International Conference on Big Data (Big Data), pages 4017–4024. IEEE.
Fiege, U., Fiat, A., and Shamir, A. (1987). Zero knowledge proofs of identity. In Proceedings of the nineteenth annual ACM symposium on Theory of computing, pages 210–217.
Fotiou, N., Pittaras, I., Siris, V. A., Voulgaris, S., and Polyzos, G. C. (2019). Secure iot access at scale using blockchains and smart contracts. In 2019 IEEE 20th International Symposium on”A World of Wireless, Mobile and Multimedia Networks”(WoWMoM), pages 1–6. IEEE.
Frimpong, S. A., Han, M., Boahen, E. K., Sosu, R. N. A., Hanson, I., Larbi-Siaw, O., and Senkyire, I. B. (2023). Recguard: An efficient privacy preservation blockchain-based system for online social network users. Blockchain: Research and Applications, 4(1):100111.
Gabizon, A., Williamson, Z. J., and Ciobotaru, O. (2019). Plonk: Permutations over lagrange-bases for oecumenical noninteractive arguments of knowledge. Cryptology ePrint Archive.
Gramoli, V., Guerraoui, R., Lebedev, A., Natoli, C., and Voron, G. (2023). Diablo: A benchmark suite for blockchains. In Proceedings of the Eighteenth European Conference on Computer Systems, pages 540–556.
Guidi, B. (2020). When blockchain meets online social networks. Pervasive and Mobile Computing, 62:101131.
Holmes, A. (2021). 533 million facebook users’ phone numbers and personal data have been leaked online.
Hu, V. C. and Hu, V. C. (2022). Blockchain for access control systems. US Department of Commerce, National Institute of Standards and Technology.
Li, R., Shen, C., He, H., Gu, X., Xu, Z., and Xu, C.-Z. (2017). A lightweight secure data sharing scheme for mobile cloud computing. IEEE Transactions on Cloud Computing, 6(2):344–357.
Mendoza-Tello, J. C., Mora, H., Pujol-López, F. A., and Lytras, M. D. (2018). Social commerce as a driver to enhance trust and intention to use cryptocurrencies for electronic payments. Ieee Access, 6:50737–50751.
Peffers, K., Tuunanen, T., Rothenberger, M. A., and Chatterjee, S. (2007). A design science research methodology for information systems research. Journal of management information systems, 24(3):45–77.
Pinno, O. J. A., Gregio, A. R. A., and De Bona, L. C. (2017). Controlchain: Blockchain as a central enabler for access control authorizations in the iot. In GLOBECOM 2017-2017 IEEE Global Communications Conference, pages 1–6. IEEE.
PRAVALLIKA, G., RAO, C. P., and DEEPIKA, Y. V. S. (2025). A block chain-based security sharing framework with fine-grained access control for personal data. Stanford & Oxbridge Journal of Emerging Science and Computing Intelligence (SOJ-ESCI), 5(2):29–37.
Shukla, S., Bisht, K., Tiwari, K., and Bashir, S. (2023). Data Economy in the Digital Age. Springer.
Wang, Y., Li, S., Liu, H., Zhang, H., and Pan, B. (2022). A reference architecture for blockchain-based traceability systems using domain-driven design and microservices. In 2022 29th Asia-Pacific Software Engineering Conference (APSEC), pages 269–278. IEEE.
Yang, F., Wang, Y., Fu, C., Hu, C., and Alrawais, A. (2020). An efficient blockchain-based bidirectional friends matching scheme in social networks. IEEE Access, 8:150902–150913.
Zhang, S., Yao, T., Arthur Sandor, V. K., Weng, T.-H., Liang, W., and Su, J. (2021). A novel blockchain-based privacy-preserving framework for online social networks. Connection Science, 33(3):555–575.
Publicado
08/09/2026
Como Citar
BEZERRA, Irvin S.; TIMES, Valéria C.; MORENO, Bruno N..
De-Authorizer: Uma Arquitetura Baseada em Blockchain para Revogação Descentralizada de Acesso a Dados em Redes Sociais Online. In: SIMPÓSIO BRASILEIRO DE BANCO DE DADOS (SBBD), 41. , 2026, São Carlos/SP.
Anais [...].
Porto Alegre: Sociedade Brasileira de Computação,
2026
.
p. 141-154.
ISSN 2763-8979.
DOI: https://doi.org/10.5753/sbbd.2026.249157.
