Publications & Patents
I have been working with public key infrastructure and post-quantum cryptography since the beginning of my undergraduate in 2017; from hash-based signature schemes for my undergraduate thesis to designing a novel key management model for the signing of digital documents as my masters thesis.
- L. Mayr. On the Improvements to Digital Document Signature Usability Through PKI Transparency. Master Thesis, June 2024.
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L. Mayr, L. Palma, G. Zambonin, W. Silvano, and R. Custódio.
Monitoring key pair usage through distributed ledgers and one-time
signatures. Information, 14(10):523–537, September 2023.
doi:10.3390/info14100523 -
F. Schardong, L. Mayr, R. Custódio.
PROCESSO PARA ASSINATURA E VERIFICAÇÃO DE ASSINATURA DIGITAL.
June 2022.
BR1020220128740A2 - L. Mayr. Implementing a library to provide Winternitz signatures with lightweight primitive using the Rust Programming Language. Bachelor thesis. Universidade Federal de Santa Catarina, May 2021.
Professional experience
I work as the cybersecurity architect at Operador Nacional do Registro Civil de Pessoas Naturais do Brasil (ONRCPN), the agency responsible for the technological advancements of the Brazilian Civil Registry. Moreover, I research topics related to cryptography and public key infrastructure and work as a freelance in these subjects.
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[Jan/2021–Today] Cybersecurity Architect (Fulltime)
I am responsible for the design, implementation, and deployment of the ON-RCPN Public Key Infrastructure and its ceremonies and policies. I also lead the technical steps of mutual trust agreements between different PKI environments. I am also responsible for underlying CSIRT systems used by ON-RCPN.
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[Mar/2021–Today] Cybersecurity architect (Freelance)
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I am the liaison between LabSEC and the government agency responsible for the regulation and auditing of the communication and information technology sector in Mozambique, Instituto Nacional de Tecnologias de Informação e Comunicação, for all things PKI; which lead to the creation of the Mozambique PKI in 2023.
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PKI specialist for the project titled "Serviços de Assinatura Digital de Documentos Eletrônicos para Instituições de Ensino" in conjunction with the Brazilian Network for Education and Research, which aims to increase the use of digital signatures in the academic environment of federal universities through novel advancements in PKI, digital certificates, and identity management.
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[Aug/2020–Jun/2023] Project manager
I led the project responsible for the Certificate Management System of the Brazilian Public Key Infrastructure (ICP-Brasil), which encompassed the development of a smartcard management system, the update of the underlying OpenSSL wrapper libcryptosec from version 1.0.2 to versions 1.1.x and 3.x, and the integration of Open Quantum Safe post-quantum bindings.
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[Jul/2017–Aug/2020] Software developer
I developed and maintained the Certificate Management System of the Brazilian Public Key Infrastructure (ICP-Brasil), its smartcards applets and OpenSC integrations; I also worked on the update process of these systems from Redhat 5 to Redhat 7. I am responsible for adding support for custom HSM engines and Edward curves to these applications. Lastly, I implemented symmetric key management systems, researched election protocols, and implemented a secure OTP service that runs inside HSMs.
Academic activities
Other activities I am/was involved with in regards to Computer Science.
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Teaching assistantships
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[Aug/2021–Nov/2021] INE5429 Computer Security
Class no. 07208 of the Graduate Program in Computer Science at UFSC.
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Involvement in BSc theses
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[Jul/2022-Jul/2023] Co-supervision of G. Cabral
BSc in Information Systems at UFSC. Thesis named Assinatura de Documentos com Certificado de Uso Único e Chaves Geradas no Cliente.
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[Mar/2022-Jul/2023] Co-supervision of A. Milanez
BSc in Computer Science at UFSC. Thesis named Cripparency: Protocolo Baseado em Certificate Transparency para Rastreabilidade de Certificados de Uso Único Utilizando Blockchain.
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[Aug/2019–May/2021] Member of evaluation board of A. Alves
BSc in Computer Science at UFSC. Thesis named Serviço de emissão de certificados digitais com base em dados de CNHs digitais..
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[Aug/2019–May/2021] Member of evaluation board of G. Sartori
BSc in Computer Science at UFSC. Thesis named Software de Código Aberto para Prestadores de Serviço de Confiança.
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Miscellaneous activities
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[Jul/2023] Speaker and organizer at workshop titled LabSEC Day
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[Mar/2023] Invited speaker at workshop titled Sistema de Certificação Digital de Moçambique (SCDM)
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[Mar/2023] Teacher at the Digital Certification and Electronic Identities course held at LabSEC (20h).
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[Jan/2023] Teacher at the Hardware Security Module (HSM) Management and Operation, and Formal Ceremonies course held at LabSEC (60h).
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[Aug/2022] Invited speaker at workshop titled Plataforma do Sistema de Certificação Digital de Moçambique
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Humanitarian Work
I and am involved in humanitarian projects in Africa related to electronic documents and digital signatures (under construction).
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[Jan/2021–Today] Mozambique SCDM
UFSC formaliza cooperação com Moçambique para implantação Certificação Digital no país
With respects to other domains of computer science, I am always eager to learn about constraint programming, optimization techniques, physics computer simulations, and quantum computing. Ouside the realm of computer science, I enjoy tabletop RPG (scheduling issues notwhistanding), historical and fantasy fiction, and some Dwarf Fortress shenanigans. Strike the earth!