I finished my PhD at IME - USP in 2022.

My main focus is on (post-quantum) cryptography, but I am also interested in computer and network security in general.

Contact me using thalespaiva at larc dot usp dot br.

You can also see my publications at my Google Scholar page.


Publications

  1. Tailoring two-dimensional codes for structured lattice-based KEMs and applications to Kyber
    Authors: Thales B. Paiva, Marcos A. Simplicio Jr, Syed Mahbub Hafiz, Bahattin Yildiz, and Eduardo L. Cominetti
    Preprint 2024

  2. KyberSlash: Exploiting secret-dependent division timings in Kyber implementations
    Authors: Daniel J. Bernstein, Karthikeyan Bhargavan, Shivam Bhasin, Anupam Chattopadhyay, Tee Kiah Chia, Matthias J. Kannwischer, Franziskus Kiefer, Thales Paiva, Prasanna Ravi, and Goutam Tamvada
    Preprint 2024

  3. Et tu, Brute? SCA Assisted CCA using Valid Ciphertexts-A Case Study on HQC KEM
    Authors: Thales Paiva, Prasanna Ravi, Dirmanto Jap, and Shivam Bhasin
    Preprint 2024

  4. Defeating Low-Cost Countermeasures against Side-Channel Attacks in Lattice-based Encryption: A Case Study on Crystals-Kyber
    Authors: Prasanna Ravi, Thales Paiva, Dirmanto Jap, Jan-Pieter D’Anvers, and Shivam Bhasin
    Venue: CHES 2024
    PDF Source code

  5. Faster Constant-Time Decoder for MDPC Codes and Applications to BIKE KEM
    Authors: Thales B. Paiva and Routo Terada
    Venue: CHES 2022
    PDF Source code

  6. BGP Anomalies Classification using Features based on AS Relationship Graphs
    Authors: Thales B. Paiva, Yaissa Siqueira, Daniel Batista, Roberto Hirata Jr. and Routo Terada
    Venue: Latincom 2021
    PDF Slides Source code

  7. Cryptanalysis of the binary permuted kernel problem
    Authors: Thales B. Paiva and Routo Terada
    Venue: ACNS 2021
    PDF Slides (short) Slides (long) Source code

  8. A timing attack on the HQC encryption scheme
    Authors: Thales B. Paiva and Routo Terada
    Venue: Selected Areas in Cryptography 2019
    PDF Slides Source code

  9. Robust covert channels based on DRAM power consumption
    Authors: Thales B. Paiva, Javier Navaridas and Routo Terada
    Venue: Information Security Conference 2019
    PDF Slides Source code

  10. Improving the efficiency of a reaction attack on the QC-MDPC McEliece
    Authors: Thales B. Paiva and Routo Terada
    Venue: IEICE TRANS. on Fundamentals 2018
    PDF Source code

  11. Two algorithms to improve the reaction attack on the QC-MDPC McEliece
    Authors: Thales B. Paiva and Routo Terada
    Venue: SBSeg 2018 - CTD
    PDF Source code

MSc