My academic work has developed across engineering, scientific computing, cryptography, electronic documents, digital signatures, identity, post-quantum cryptography, and artificial intelligence.
This archive is not intended to reproduce a curriculum vitae. It is a historical view of how research questions, projects, technological artifacts, publications, students, and collaborations have evolved and intersected over time.
Historical Trajectory
The archive organizes my academic trajectory as a sequence of overlapping research periods. Period labels identify dominant themes rather than strict boundaries.
1981–1989
Engineering and Early Computing
Electrical engineering, measurement and control systems, software generation, industrial automation, and the first computational artifacts.
Sistema Universal de Calibração1983 · Software & Data
Gerador Automático de Programas1985 · Software & Data
Controlador Inteligente de Temperaturas1987 · Software & Data
Sistema de Monitoração de Prensas1987 · Software & Data
Sistema de Monitoração de Caldeiras1987 · Software & Data
Banco de Ensaio de Motores a Combustão Interna1988 · Software & Data
1990–1999
Scientific Computing, Cryptography and Security
A transition from engineering and scientific computing to computer science, nonlinear analysis, cryptography, and security research.
Sistema de Controle de Infecção Hospitalar1993 · Software & Data
TSAS1997 · Software & Data
PulSA1999 · Software & Data
Projetos de Caixas S1999–2001 · Project
Criptossitemas Caóticos1999–2001 · Project
Modelo Simplificado de Cifradores de Bloco1999–2001 · Project
2000–2009
Electronic Documents, PKI and Digital Trust
The consolidation of LabSEC and a sustained research program on electronic documents, public-key infrastructure, digital signatures, electronic voting, trusted key management, and long-term digital trust.
Cartório Virtual1999–2004 · Project
Protocoladora Digital de Documentos Eletrônicos1999–2008 · Project
Votação Digital1999–2008 · Project
Cartório Virtual2000 · Software & Data
LabSECSigner2000 · Software & Data
Protocoladora Digital de Documentos Eletrônicos (PDDE)2000–2001 · Software & Data
OSTRACON2001–2002 · Software & Data
OpenHSM2005 · Software & Data
Programa João de Barro2005–2007 · Project
Hardware Criptográfico para Infraestrutura de Chaves Públicas (HSM)2007 · Software & Data
Sistema Gerenciador de Certificados Digitais2007 · Software & Data
Revisão dos Algoritmos e Chaves da ICP-Brasil: Recomendações LabSEC/Câmara Brasileira de Comércio Eletrônico2008–2009 · Books & Texts
Hierarquia de Múltiplas Raízes: Minimizando o Impacto da Quebra de Algoritmos Criptográficos no Âmbito da ICP-Brasil2008–2009 · Books & Texts
Desenvolvimento de Códigos de Referência para o Padrão Brasileiro de Assinatura Digital2009–2011 · Project
2010–2019
Digital Signatures, Identity and Cryptographic Infrastructure
Digital-signature infrastructure matured into reference implementations, policy management, authentication, identity, and deployable trust services.
Autenticação Multifator em Sistemas Computacionais2010–2011 · Project
Biblioteca de Códigos de Referência de Assinatura Digital2010–2011 · Software & Data
Assinador Minimalista PBAD2010–2011 · Software & Data
Políticas de Assinatura Digital e Listas de Políticas Aprovadas em CAdES e XAdES2010–2011 · Software & Data
Certificado de Identificação Mobile para acesso seguro a ambientes de telesaude e telemedicina2011–2014 · Project
Sistema de Gerenciamento de Certificados (SGC), versão Hawa2013 · Talk
Hawa2013 · Software & Data
Sistema Automático para a Emissão de Certificados Digitais (SAEC)2018 · Software & Data
CRC Nacional e Identidade Digital2019 · Talk
2020–2026
Post-Quantum Cryptography, Electronic Identity and AI
Research expands from mature digital-trust infrastructure toward post-quantum transition, electronic identity, document confidentiality, AI agents, and national-scale digital public infrastructure.
Sistema de Gerenciamento de Certificados Digitais Pós-quânticos2020 · Software & Data
Sistema de Gerenciamento de Identidades Eletrônicas2020 · Software & Data
Certificação Digital e Identidade Eletrônica2021– · Project
Segurança de Documentos Eletrônicos2021– · Project
Segurança, Eficiência e Controle na Gestão Documental (SecDoc)2025– · Project
25 anos do LabSEC2025 · Talk
Registro Eletrônico Federado (REF)2026 · Software & Data
ICP-RC2026 · Software & Data
IdRC2026 · Software & Data
Intelligent OCR2026 · Software & Data
ARIA2026 · Software & Data
Personal AI2026 · Project
Research Genealogies
These genealogies show long-running research continuities across projects, publications, software, texts, supervision, and talks. Their sequence is historical and editorial; it does not by itself assert causality or derivation.
Electronic Documents & Long-Term Preservation
From early cryptographic protocols for electronic records and trusted dating to digital signatures, long-term preservation, confidentiality, and secure document management.
1999–2004Cartório VirtualProject
→2000Protocolo Criptográfico para a Emissão de Certidão de Nascimento na WEBBooks & Texts
→1999–2008Protocoladora Digital de Documentos EletrônicosProject
→2005Sistema Brasileiro de Datação de Documentos EletrônicosBooks & Texts
→2009–2011Desenvolvimento de Códigos de Referência para o Padrão Brasileiro de Assinatura DigitalProject
→2021–Segurança de Documentos EletrônicosProject
→2020sNemiSigSoftware & Data
→2025–Segurança, Eficiência e Controle na Gestão Documental (SecDoc)Project
Public-Key Infrastructure & Digital Signatures
A research line spanning academic PKI, certificate lifecycle management, secure key custody, national digital-signature standards, and newer identity-centered and post-quantum trust infrastructures.
2003–2004GT ICP-EDUProject
→2004–2006GT ICP-EDU IIProject
→2005OpenHSMSoftware & Data
→2005–2007Programa João de BarroProject
→2007Sistema Gerenciador de Certificados DigitaisSoftware & Data
→2009–2011Desenvolvimento de Códigos de Referência para o Padrão Brasileiro de Assinatura DigitalProject
→2011Biblioteca de Códigos de Referência de Assinatura DigitalSoftware & Data
→2021–Certificação Digital e Identidade EletrônicaProject
→2020sICP-RCSoftware & Data
→2020sIdRCSoftware & Data
→2020Sistema de Gerenciamento de Certificados Digitais Pós-quânticosSoftware & Data
Electronic Identity
A trajectory from PKI-based identification and authentication toward identity-centered signing, electronic identity management, and civil-registration identity infrastructure.
2011–2014Certificado de Identificação Mobile para acesso seguro a ambientes de telesaude e telemedicinaProject
→2020Sistema de Gerenciamento de Identidades EletrônicasSoftware & Data
→2021–Certificação Digital e Identidade EletrônicaProject
→2020sADESSoftware & Data
→2020sIdRCSoftware & Data
→2020sICP-RCSoftware & Data
Electronic Voting
Research on verifiable and privacy-preserving electronic voting, including the OSTRACON system and the Farnel-based verifiable voting protocol.
1999–2008Votação DigitalProject
→2001–2002OSTRACONSoftware & Data
Post-Quantum Cryptography
From post-quantum certificate management to protocol migration, electronic identity, and systematic research on cryptographic algorithms resistant to quantum adversaries.
2020Sistema de Gerenciamento de Certificados Digitais Pós-quânticosSoftware & Data
→2020sPost-Quantum Cryptographic AlgorithmsProject
→2021–Certificação Digital e Identidade EletrônicaProject
Finite-Field Arithmetic & Cryptography
A distinct cryptographic research line concerned with efficient arithmetic over binary extension fields, irreducible polynomials, modular reduction, and implementation cost.
2020sFinite-Field ArithmeticProject
AI, Agents & Digital Trust
An emerging line connecting artificial intelligence with trustworthy digital infrastructures, personal AI agents, identity, authorization, and domain-specific sovereign AI.
2020sPersonal AIProject
→2020sARIASoftware & Data
→2020sInovação Tecnológica no Registro Civil Operador Nacional do Registro Civil do Brasil (ON-RCPN)Project
About this Archive
This archive is evidence-based and metadata-centered. Canonical records remain in their original collections, while this page provides historical context and cross-collection interpretation. Gaps are preserved when documentary evidence is incomplete.
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