Publications

Scientific publications by Ricardo Custódio.

My research publications span information security, cryptography, digital signatures, digital identity, electronic documents, finite-field arithmetic, post-quantum cryptography, and artificial intelligence applied to security.

This bibliography is being progressively consolidated from DBLP, ORCID, Lattes, Google Scholar, and my personal academic archive.

Selected Publications

The publications below highlight representative contributions from different stages and areas of my research.

This section is under construction.

Selected publications will be curated to represent major research directions rather than simply the most recent or most cited papers.

Recent Publications

2026

• Redefining Digital Web Signature Secrecy: A Client-Side Model for Enhanced Security and Compliance.
  Wellington F. Silvano, Lucas Mayr, Enzo Brum, Gabriel Cabral, Frederico Schardong, Ricardo Custódio.
  Journal of the Brazilian Computer Society, 2026.
  DOI

• Cryptographic Applications of Combinatorial Ranking for Integer Compositions.
  Gustavo Zambonin, R. R. de Carvalho, Ricardo Custódio, Eduardo P. Ribeiro.
  IWOCA, 2026.

• Anamorphic Construction For The Winternitz OTS Scheme Family.
  Lucas Mayr, Felipe F. Faleiro, Anderson C. A. Nascimento, Ricardo Custódio.
  IACR Transactions on Cryptographic Hardware and Embedded Systems, 2026.

2025

• From ElGamal to Lattice-Based: Enhancing Helios Voting with Quantum-Safe Cryptography.
  João Barbosa, Gustavo Zambonin, Thaís B. Idalino, Ricardo Custódio.
  ACNS, 2025.

• Automation and Risk: Transformers Models Reshape Sensitive Information Management.
  Wellington F. Silvano, Maurício Konrath, Lucas Mayr, Ricardo Custódio.
  ICISS, 2025.

Complete bibliography ↓

Research Areas

Publications can broadly be associated with the following research directions:

• Cryptography and cryptographic protocols
• Finite-field arithmetic
• Digital signatures
• Public key infrastructure
• Digital identity
• Electronic documents and preservation
• Post-quantum cryptography
• Artificial intelligence and security

As the archive evolves, publications will also be browsable by research area, year, publication type, and associated project.

Complete Bibliography

The bibliography below is generated from the site’s canonical BibTeX database.

References

Arantes, Juliana Amaral, Carlos Becker Westphall, Ricardo Felipe Custódio, and Shirlei Aparecida de Chaves. 2010. “Analytical Model to Evaluate the Performance of Mobile Agents in a Generic Network Topology.” J. Netw. Syst. Manag. 18 (4): 357–73. https://doi.org/10.1007/S10922-010-9173-X.

Araújo, Roberto, Ricardo Felipe Custódio, and Jeroen van de Graaf. 2007. “A Verifiable Voting Protocol Based on Farnel.” IACR Cryptol. ePrint Arch. 2007: 252. http://eprint.iacr.org/2007/252.

Araújo, Roberto, Ricardo Felipe Custódio, and Jeroen van de Graaf. 2010. “A Verifiable Voting Protocol Based on Farnel.” In Towards Trustworthy Elections, New Directions in Electronic Voting, edited by David Chaum, Markus Jakobsson, Ronald L. Rivest, et al., vol. 6000. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-642-12980-3\_17.

Astrizi, Thiago Leucz, and Ricardo Custódio. 2022. “Redacting Blockchain Without Exposing Chameleon Hash Collisions.” In Cryptology and Network Security - 21st International Conference, CANS 2022, Dubai, United Arab Emirates, November 13-16, 2022, Proceedings, edited by Alastair R. Beresford, Arpita Patra, and Emanuele Bellini, vol. 13641. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-031-20974-1\_18.

Banegas, Gustavo, Ricardo Felipe Custódio, and Daniel Panario. 2018a. “A New Class of Irreducible Pentanomials for Polynomial Based Multipliers in Binary Fields.” CoRR abs/1806.00432. https://doi.org/10.48550/ARXIV.1806.00432.

Banegas, Gustavo, Ricardo Felipe Custódio, and Daniel Panario. 2018b. “A New Class of Irreducible Pentanomials for Polynomial Based Multipliers in Binary Fields.” IACR Cryptol. ePrint Arch. 2018: 554. https://eprint.iacr.org/2018/554.

Banegas, Gustavo, Ricardo Felipe Custódio, and Daniel Panario. 2019. “A New Class of Irreducible Pentanomials for Polynomial-Based Multipliers in Binary Fields.” J. Cryptogr. Eng. 9 (4): 359–73. https://doi.org/10.1007/S13389-018-0197-6.

Barbosa, João Pedro Cardoso, Gustavo Zambonin, Thaı́s Bardini Idalino, and Ricardo Felipe Custódio. 2025. “From ElGamal to Lattice-Based: Enhancing Helios Voting with Quantum-Safe Cryptography.” In Applied Cryptography and Network Security - 23rd International Conference, ACNS 2025, Munich, Germany, June 23-26, 2025, Proceedings, Part III, edited by Marc Fischlin and Veelasha Moonsamy, vol. 15827. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-031-95767-3\_2.

Brocardo, Marcelo Luiz, Ricardo Felipe Custódio, Carlos Roberto De Rolt, Julio Da Silva Dias, and Issa Traoré. 2015. “Sharing Privacy Information in Credit Analysis Environment.” Ninth International Conference on Complex, Intelligent, and Software Intensive Systems, CISIS 2015, Santa Catarina, Brazil, July 8-10, 2015, 491–96. https://doi.org/10.1109/CISIS.2015.72.

Brocardo, Marcelo Luiz, Carlos Roberto De Rolt, Julio Da Silva Dias, Ricardo Felipe Custódio, and Issa Traoré. 2017. “Privacy Information in a Positive Credit System.” Int. J. Grid Util. Comput. 8 (1): 61–69. https://doi.org/10.1504/IJGUC.2017.10003005.

Carlos, Marcelo Carlomagno, Jean Everson Martina, Geraint Price, and Ricardo Felipe Custódio. 2012. “A Proposed Framework for Analysing Security Ceremonies.” In SECRYPT 2012 - Proceedings of the International Conference on Security and Cryptography, Rome, Italy, 24-27 July, 2012, SECRYPT Is Part of ICETE - the International Joint Conference on e-Business and Telecommunications, edited by Pierangela Samarati, Wenjing Lou, and Jianying Zhou. SciTePress.

Carlos, Marcelo Carlomagno, Jean Everson Martina, Geraint Price, and Ricardo Felipe Custódio. 2013. “An Updated Threat Model for Security Ceremonies.” In Proceedings of the 28th Annual ACM Symposium on Applied Computing, SAC ’13, Coimbra, Portugal, March 18-22, 2013, edited by Sung Y. Shin and José Carlos Maldonado. ACM. https://doi.org/10.1145/2480362.2480705.

Castro Biage, Gustavo de, Gustavo Zambonin, Thaı́s Bardini Idalino, Daniel Panario, and Ricardo Felipe Custódio. 2024. “A Concrete LIP-Based KEM with Simple Lattices.” IEEE Access 12: 16408–20. https://doi.org/10.1109/ACCESS.2024.3358670.

Costa, Robson, Paulo Portugal, Francisco Vasques, Ricardo de Moraes, and Ricardo Felipe Custódio. 2011. “A Coordination Layer to Handle Real-Time Communication in Wi-Fi Networks with Uncontrolled Traffic Sources.” In IEEE 36th Conference on Local Computer Networks, LCN 2011, Bonn, Germany, October 4-7, 2011, edited by Chun Tung Chou, Tom Pfeifer, and Anura P. Jayasumana. IEEE Computer Society. https://doi.org/10.1109/LCN.2011.6115204.

Custódio, Ricardo Felipe. 1999. “Análise não-Linear No Reconhecimento de Padrões Sonoros : Estudo de Caso Para Sons Pulmonares.” PhD thesis, Universidade Federal do Rio Grande do Sul, Brazil. http://hdl.handle.net/10183/17974.

Custódio, Ricardo Felipe, Martı́n Augusto Gagliotti Vigil, Juliano Romani, Fernando Carlos Pereira, and Joni da Silva Fraga. 2008. “Optimized Certificates - A New Proposal for Efficient Electronic Document Signature Validation.” In Public Key Infrastructure, 5th European PKI Workshop: Theory and Practice, EuroPKI 2008, Trondheim, Norway, June 16-17, 2008, Proceedings, edited by Stig Fr. Mjølsnes, Sjouke Mauw, and Sokratis K. Katsikas, vol. 5057. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-540-69485-4\_4.

Custódio, Ricardo, Ricardo M. Silva, Jorge Sá Silva, David Nunes, Fernando Boavida, and Carlos Herrera. 2013. “\(\mu\)Mobile IPv6 in Wireless Sensor Networks.” Seventh International Conference on Sensing Technology, ICST 2013, Wellington, New Zealand, December 3-5, 2013, 719–24. https://doi.org/10.1109/ICSENST.2013.6727747.

Dias, Júlio S., Denise B. Demétrio, Ricardo Felipe Custódio, and Carlos Roberto De Rolt. 2003. “Reliable Clock Synchronization for Eletronic Documents.” In 3rd Latin American Network Operations and Management Symposium, LANOMS 2003, Iguassu Falls, Brazil, September 4-6, 2003. Proceedings, edited by Elias Procópio Duarte Jr. and Edmundo R. M. Madeira. Federal University of Parana. http://www.lanoms.org/2005/anaiscd/2003/1-2.pdf.

Giron, Alexandre Augusto, Ricardo Custódio, and Francisco Rodrı́guez-Henrı́quez. 2023. “Post-Quantum Hybrid Key Exchange: A Systematic Mapping Study.” J. Cryptogr. Eng. 13 (1): 71–88. https://doi.org/10.1007/S13389-022-00288-9.

Giron, Alexandre Augusto, Jean Everson Martina, and Ricardo Felipe Custódio. 2020. “Bitcoin Blockchain Steganographic Analysis.” In Applied Cryptography and Network Security Workshops - ACNS 2020 Satellite Workshops, AIBlock, AIHWS, AIoTS, Cloud s&p, SCI, SecMT, and SiMLA, Rome, Italy, October 19-22, 2020, Proceedings, edited by Jianying Zhou, Mauro Conti, Chuadhry Mujeeb Ahmed, et al., vol. 12418. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-030-61638-0\_3.

Giron, Alexandre Augusto, Jean Everson Martina, and Ricardo Felipe Custódio. 2021. “Steganographic Analysis of Blockchains.” Sensors 21 (12): 4078. https://doi.org/10.3390/S21124078.

Giron, Alexandre Augusto, João Pedro Adami do Nascimento, Ricardo Custódio, and Lucas Pandolfo Perin. 2022. “Post-Quantum Hybrid KEMTLS Performance in Simulated and Real Network Environments.” IACR Cryptol. ePrint Arch. 2022: 1639. https://eprint.iacr.org/2022/1639.

Giron, Alexandre Augusto, João Pedro Adami do Nascimento, Ricardo Custódio, Lucas Pandolfo Perin, and Vı́ctor Mateu. 2023. “Post-Quantum Hybrid KEMTLS Performance in Simulated and Real Network Environments.” In Progress in Cryptology - LATINCRYPT 2023 - 8th International Conference on Cryptology and Information Security in Latin America, LATINCRYPT 2023, Quito, Ecuador, October 3-6, 2023, Proceedings, edited by Abdelrahaman Aly and Mehdi Tibouchi, vol. 14168. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-031-44469-2\_15.

Giron, Alexandre Augusto, Frederico Schardong, Lucas Pandolfo Perin, Ricardo Custódio, Victor Valle, and Vı́ctor Mateu. 2023. “Automated Issuance of Post-Quantum Certificates: A New Challenge.” IACR Cryptol. ePrint Arch. 2023: 1921. https://eprint.iacr.org/2023/1921.

Giron, Alexandre Augusto, Frederico Schardong, Lucas Pandolfo Perin, Ricardo Custódio, Victor Valle, and Vı́ctor Mateu. 2024. “Automated Issuance of Post-Quantum Certificates: A New Challenge.” In Applied Cryptography and Network Security - 22nd International Conference, ACNS 2024, Abu Dhabi, United Arab Emirates, March 5-8, 2024, Proceedings, Part II, edited by Christina Pöpper and Lejla Batina, vol. 14584. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-031-54773-7\_1.

Guimarães, Marcelo Ferreira, Carlos Antônio Sell, Renato Parenti Turcato, Carlos Henrique Assuiti, Ricardo Custódio, and Ricardo Antônio Pralon Santos. 2024. “Proposal of an Electronic Auditing System Applied to the Brazilian Electronic Voting Machine.” CoRR abs/2408.11195. https://doi.org/10.48550/ARXIV.2408.11195.

Idalino, Thaı́s Bardini, Lucia Moura, Ricardo Felipe Custódio, and Daniel Panario. 2015. “Locating Modifications in Signed Data for Partial Data Integrity.” Inf. Process. Lett. 115 (10): 731–37. https://doi.org/10.1016/J.IPL.2015.02.014.

Idalino, Thaı́s Bardini, Lucia Moura, Ricardo Felipe Custódio, and Daniel Panario. 2022. “Locating Modifications in Signed Data for Partial Data Integrity.” CoRR abs/2208.01411. https://doi.org/10.48550/ARXIV.2208.01411.

Marchiori, Dúnia, Ricardo Custódio, Daniel Panario, and Lucia Moura. 2024. “Probabilistic Root Finding in Code-Based Cryptography.” J. Cryptogr. Eng. 14 (1): 71–85. https://doi.org/10.1007/S13389-023-00329-X.

Martina, Jean Everson, Eduardo dos Santos, Marcelo Carlomagno Carlos, Geraint Price, and Ricardo Felipe Custódio. 2015. “An Adaptive Threat Model for Security Ceremonies.” Int. J. Inf. Sec. 14 (2): 103–21. https://doi.org/10.1007/S10207-014-0253-X.

Martina, Jean Everson, Túlio Cicero Salvaro de Souza, and Ricardo Felipe Custódio. 2007. “OpenHSM: An Open Key Life Cycle Protocol for Public Key Infrastructure’s Hardware Security Modules.” In Public Key Infrastructure, 4th European PKI Workshop: Theory and Practice, EuroPKI 2007, Palma de Mallorca, Spain, June 28-30, 2007, Proceedings, edited by Javier López, Pierangela Samarati, and Josep L. Ferrer, vol. 4582. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-540-73408-6\_16.

Martina, Jean Everson, Túlio Cicero Salvaro de Souza, and Ricardo Felipe Custódio. 2009. “Ceremonies Formal Analysis in PKI’s Context.” Proceedings of the 12th IEEE International Conference on Computational Science and Engineering, CSE 2009, Vancouver, BC, Canada, August 29-31, 2009, 392–98. https://doi.org/10.1109/CSE.2009.324.

Martins, Douglas Marcelino Beppler, Gustavo Banegas, and Ricardo Felipe Custódio. 2019a. IACR Cryptol. ePrint Arch. 2019: 797. https://eprint.iacr.org/2019/797.

Martins, Douglas Marcelino Beppler, Gustavo Banegas, and Ricardo Felipe Custódio. 2019b. “Don’t Forget Your Roots: Constant-Time Root Finding over \Mathbb f_2^m F 2 m.” In Progress in Cryptology - LATINCRYPT 2019 - 6th International Conference on Cryptology and Information Security in Latin America, Santiago de Chile, Chile, October 2-4, 2019, Proceedings, edited by Peter Schwabe and Nicolas Thériault, vol. 11774. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-030-30530-7\_6.

Mayr, Lucas, João Gabriel Feres, Bruno Bianchi Pagani, and Ricardo Custódio. 2026. “Anamorphic Construction for the Winternitz OTS Scheme Family.” IACR Cryptol. ePrint Arch. 2026: 948. https://eprint.iacr.org/2026/948.

Mayr, Lucas, Lucas M. Palma, Gustavo Zambonin, Wellington Silvano, and Ricardo Custódio. 2023. “Monitoring Key Pair Usage Through Distributed Ledgers and One-Time Signatures.” Inf. 14 (10): 523. https://doi.org/10.3390/INFO14100523.

Mayr, Lucas, Frederico Schardong, and Ricardo Felipe Custódio. 2022. “Simplifying Electronic Document Digital Signatures.” CoRR abs/2208.03951. https://doi.org/10.48550/ARXIV.2208.03951.

Moraes, Ricardo de, Paulo Portugal, Francisco Vasques, and Ricardo Felipe Custódio. 2010. “Assessment of the IEEE 802.11e EDCA Protocol Limitations When Dealing with Real-Time Communication.” EURASIP J. Wirel. Commun. Netw. 2010. https://doi.org/10.1155/2010/351480.

Niehues, Lucas Boppre, Ricardo Felipe Custódio, and Daniel Panario. 2018. “Fast Modular Reduction and Squaring in GF(2\({}^{\mbox{\emph{m}}}\)).” Inf. Process. Lett. 132: 33–38. https://doi.org/10.1016/J.IPL.2017.12.002.

Pereira, Fernando Carlos, Joni da Silva Fraga, and Ricardo Felipe Custódio. 2008. “Self-Adaptable and Intrusion Tolerant Certificate Authority for Mobile Ad Hoc Networks.” 22nd International Conference on Advanced Information Networking and Applications, AINA 2008, GinoWan, Okinawa, Japan, March 25-28, 2008, 705–12. https://doi.org/10.1109/AINA.2008.141.

Perin, Lucas Pandolfo, Gustavo Zambonin, Ricardo Felipe Custódio, Lucia Moura, and Daniel Panario. 2021. “Improved Constant-Sum Encodings for Hash-Based Signatures.” J. Cryptogr. Eng. 11 (4): 329–51. https://doi.org/10.1007/S13389-021-00264-9.

Perin, Lucas Pandolfo, Gustavo Zambonin, Douglas Marcelino Beppler Martins, Ricardo Felipe Custódio, and Jean Everson Martina. 2018. “Tuning the Winternitz Hash-Based Digital Signature Scheme.” 2018 IEEE Symposium on Computers and Communications, ISCC 2018, Natal, Brazil, June 25-28, 2018, 537–42. https://doi.org/10.1109/ISCC.2018.8538642.

Ramos, Thiago Acórdi, Nelson da Silva, Lau Cheuk Lung, Jonathan Gehard Kohler, and Ricardo Felipe Custódio. 2010. “An Infrastructure for Long-Term Archiving of Authenticated and Sensitive Electronic Documents.” In Public Key Infrastructures, Services and Applications - 7th European Workshop, EuroPKI 2010, Athens, Greece, September 23-24, 2010. Revised Selected Papers, edited by Jan Camenisch and Costas Lambrinoudakis, vol. 6711. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-642-22633-5\_14.

Santos, Eduardo dos, Jean Everson Martina, and Ricardo Felipe Custódio. 2012. “Towards a Formal Verification of a Multi-Factor Authentication Protocol Using Automated Theorem Provers.” In 11th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, TrustCom 2012, Liverpool, United Kingdom, June 25-27, 2012, edited by Geyong Min, Yulei Wu, Lei (Chris) Liu, Xiaolong Jin, Stephen A. Jarvis, and Ahmed Yassin Al-Dubai. IEEE Computer Society. https://doi.org/10.1109/TRUSTCOM.2012.278.

Schardong, Frederico, and Ricardo Custódio. 2022. “Self-Sovereign Identity: A Systematic Review, Mapping and Taxonomy.” Sensors 22 (15): 5641. https://doi.org/10.3390/S22155641.

Schardong, Frederico, and Ricardo Custódio. 2024a. “From Self-Sovereign Identity to Fiduciary Identity: A Journey Towards Greater User Privacy and Usability.” In Proceedings of the 39th ACM/SIGAPP Symposium on Applied Computing, SAC 2024, Avila, Spain, April 8-12, 2024, edited by Jiman Hong, Juw Won Park, and Adam Przybylek. ACM. https://doi.org/10.1145/3605098.3636061.

Schardong, Frederico, and Ricardo Custódio. 2024b. “The Role-Artifact-Function Framework for Understanding Digital Identity Models.” In Conceptual Modeling - 43rd International Conference, ER 2024, Pittsburgh, PA, USA, October 28-31, 2024, Proceedings, edited by Wolfgang Maass, Hyoil Han, Hasan Yasar, and Nicholas J. Multari, vol. 15238. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-031-75872-0\_20.

Schardong, Frederico, and Ricardo Felipe Custódio. 2021. “Self-Sovereign Identity: A Systematic Map and Review.” CoRR abs/2108.08338. https://doi.org/10.48550/ARXIV.2108.08338.

Schardong, Frederico, Ricardo Felipe Custódio, Laércio Pioli, and João Vicente Meyer. 2021. “Matching Metadata on Blockchain for Self-Sovereign Identity.” In Business Process Management Workshops - BPM 2021 International Workshops, Rome, Italy, September 6-10, 2021, Revised Selected Papers, edited by Andrea Marrella and Barbara Weber, vol. 436. Lecture Notes in Business Information Processing. Springer. https://doi.org/10.1007/978-3-030-94343-1\_32.

Schardong, Frederico, Alexandre Augusto Giron, Fernanda Larisa Müller, and Ricardo Custódio. 2022. “Post-Quantum Electronic Identity: Adapting OpenID Connect and OAuth 2.0 to the Post-Quantum Era.” In Cryptology and Network Security - 21st International Conference, CANS 2022, Dubai, United Arab Emirates, November 13-16, 2022, Proceedings, edited by Alastair R. Beresford, Arpita Patra, and Emanuele Bellini, vol. 13641. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-031-20974-1\_20.

Semprebom, Tiago, Carlos Montez, Ricardo de Moraes, Francisco Vasques, and Ricardo Felipe Custódio. 2009. “Distributed DBP: A (m, k)-Firm Based Distributed Approach for QoS Provision in IEEE 802.15.4 Networks.” Proceedings of 12th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA 2009, September 22-25, 2008, Palma de Mallorca, Spain, 1–8. https://doi.org/10.1109/ETFA.2009.5347094.

Silvano, Wellington Fernandes, Maurı́cio Konrath, and Ricardo Felipe Custódio. 2025a. “Limits and Surprises of Cross-Lingual BERT Under Data Scarcity: A Portuguese Case Study in Sensitive-Text Classification.” In Advances in Soft Computing - 24th Mexican International Conference on Artificial Intelligence, MICAI 2025, Guanajuato, Mexico, November 3, 2025, Proceedings, Part II, edited by Lourdes Martı́nez-Villaseñor, Roberto Antonio Vázquez, and Gilberto Ochoa-Ruiz, vol. 16222. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-032-09044-7\_15.

Silvano, Wellington Fernandes, Maurı́cio Konrath, and Ricardo Felipe Custódio. 2025b. “Rethinking GAN-BERT for Sensitive Text Classification: The Impact of Training Dynamics and Domain Alignment in Low-Data Scenarios.” In Advances in Soft Computing - 24th Mexican International Conference on Artificial Intelligence, MICAI 2025, Guanajuato, Mexico, November 3, 2025, Proceedings, Part II, edited by Lourdes Martı́nez-Villaseñor, Roberto Antonio Vázquez, and Gilberto Ochoa-Ruiz, vol. 16222. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-032-09044-7\_14.

Silvano, Wellington Fernandes, Maurı́cio Konrath, Lucas Mayr, and Ricardo Felipe Custódio. 2025. “Automation and Risk: Transformers Models Reshape Sensitive Information Management.” In Information Systems Security - 21st International Conference, ICISS 2025, Indore, India, December 16-20, 2025, Proceedings, edited by Neminath Hubballi, Rakesh M. Verma, and Shyamasundar Rudrapatna K., vol. 16380. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-032-13714-2\_7.

Silvano, Wellington Fernandes, Lucas Mayr, Enzo Brum, Gabriel Cabral, Frederico Schardong, and Ricardo Custódio. 2026. “Redefining Digital Web Signature Secrecy: A Client-Side Model for Enhanced Security and Compliance.” J. Braz. Comput. Soc. 32 (1): 888–905. https://doi.org/10.5753/JBCS.2026.5556.

Souza, Rick Lopes de, Lau Cheuk Lung, and Ricardo Felipe Custódio. 2013. “Multi-Factor Authentication in Key Management Systems.” 12th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, TrustCom 2013 / 11th IEEE International Symposium on Parallel and Distributed Processing with Applications, ISPA-13 / 12th IEEE International Conference on Ubiquitous Computing and Communications, IUCC-2013, Melbourne, Australia, July 16-18, 2013, 746–52. https://doi.org/10.1109/TRUSTCOM.2013.90.

Souza, Rick Lopes de, Martı́n Augusto Gagliotti Vigil, Ricardo Felipe Custódio, Florian Caullery, Lucia Moura, and Daniel Panario. 2018. “Secret Sharing Schemes with Hidden Sets.” 2018 IEEE Symposium on Computers and Communications, ISCC 2018, Natal, Brazil, June 25-28, 2018, 713–18. https://doi.org/10.1109/ISCC.2018.8538542.

Souza, Túlio Cicero Salvaro de, Jean Everson Martina, and Ricardo Felipe Custódio. 2008. “Audit and Backup Procedures for Hardware Security Modules.” In IDtrust 2008, Proceedings of the 7th Symposium on Identity and Trust on the Internet, March 4-6, 2008, Gaithersburg, Maryland, USA, edited by Kent E. Seamons, Neal McBurnett, and Tim Polk, vol. 283. ACM International Conference Proceeding Series. ACM. https://doi.org/10.1145/1373290.1373302.

Vale, Chiarelli Araújo, Frederico Schardong, Maurı́cio de Vasconcelos Barros, and Ricardo Custódio. 2022. “Touchless Authentication for Health Professionals: Analyzing the Risks and Proposing Alternatives to Dirty Interfaces.” In 35th IEEE International Symposium on Computer-Based Medical Systems, CBMS 2022, Shenzen, China, July 21-23, 2022, edited by Linlin Shen, Alejandro Rodrı́guez González, KC Santosh, et al. IEEE. https://doi.org/10.1109/CBMS55023.2022.00088.

Vasconcelos Barros, Maurı́cio de, Frederico Schardong, and Ricardo Felipe Custódio. 2022. “Leveraging Self-Sovereign Identity, Blockchain, and Zero-Knowledge Proof to Build a Privacy-Preserving Vaccination Pass.” CoRR abs/2202.09207. https://doi.org/10.48550/ARXIV.2202.09207.

Vigil, Martı́n Augusto Gagliotti, Cristian Thiago Moecke, Ricardo Felipe Custódio, and Melanie Volkamer. 2012. “The Notary Based PKI - A Lightweight PKI for Long-Term Signatures on Documents.” In Public Key Infrastructures, Services and Applications - 9th European Workshop, EuroPKI 2012, Pisa, Italy, September 13-14, 2012, Revised Selected Papers, edited by Sabrina De Capitani di Vimercati and Chris J. Mitchell, vol. 7868. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-642-40012-4\_6.

Werlang, Felipe Carlos, Ricardo Felipe Custódio, and Martı́n Augusto Gagliotti Vigil. 2013. “A User-Centric Digital Signature Scheme.” In Public Key Infrastructures, Services and Applications - 10th European Workshop, EuroPKI 2013, Egham, UK, September 12-13, 2013, Revised Selected Papers, edited by Sokratis K. Katsikas and Isaac Agudo, vol. 8341. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-642-53997-8\_10.

Zambonin, Gustavo, Matheus S. P. Bittencourt, and Ricardo Felipe Custódio. 2019. “Handling Vinegar Variables to Shorten Rainbow Key Pairs.” In Progress in Cryptology - AFRICACRYPT 2019 - 11th International Conference on Cryptology in Africa, Rabat, Morocco, July 9-11, 2019, Proceedings, edited by Johannes Buchmann, Abderrahmane Nitaj, and Tajje-eddine Rachidi, vol. 11627. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-030-23696-0\_20.

Zambonin, Gustavo, Larissa Gremelmaier Rosa, Ricardo Custódio, and Daniel Panario. 2026. “Cryptographic Applications of Combinatorial Ranking for Integer Compositions.” In Combinatorial Algorithms - 37th International Workshop, IWOCA 2026, Clermont-Ferrand, France, June 8-11, 2026, Proceedings, edited by Florent Foucaud and Aline Parreau, vol. 16587. Lecture Notes in Computer Science. Springer. https://doi.org/10.1007/978-3-032-27732-9\_36.