Ricardo Custódio
Professor · Researcher · Advisor
My research spans information security, cryptography, digital identity, digital signatures, electronic documents, post-quantum cryptography, finite-field arithmetic, and artificial intelligence applied to security.
ORCID · Google Scholar · GitHub · Lattes · LinkedIn
Research
Digital Identity
Digital identity, authentication, authorization and verifiable credentials.
Digital Signatures
Electronic signatures, digital signatures, PKI and long-term validation.
Cryptography
Cryptographic algorithms, protocols and applied cryptography.
Finite Fields
Efficient arithmetic over binary finite fields and modular reduction.
Post-Quantum Cryptography
Cryptographic mechanisms and infrastructures for the post-quantum transition.
AI & Security
Artificial intelligence applied to security, identity and autonomous agents.
Electronic Documents
Electronic documents, long-term validation, preservation and trust infrastructures.
Information Security
Security architectures, protocols, infrastructures and trustworthy systems.
Current Research
- Personal AI Agents — identity, authorization, accountability and non-repudiation for autonomous agents.
- Digital Identity & Digital Signatures — infrastructures and protocols for trustworthy digital transactions.
- Finite Field Arithmetic — efficient multiplication and modular reduction over binary extension fields.
- Post-Quantum Cryptography — transition of digital-signature and trust infrastructures to post-quantum cryptography.
Publications
Selected and recent scientific publications will be presented here.
Books & Texts
Books, lecture notes, technical texts and other open academic resources.
Teaching
Courses, lecture notes, exercises and educational resources developed throughout my academic career.
Projects
Current and historical research and development projects.