Antonio Guimarães — newshttps://antonioguimaraes.org/Antonio Guimarães is an applied cryptographer working on fully homomorphic encryption and its applications to privacy-preserving machine learning.TUTTI, parallel CKKS bootstrapping in under 3 ms on CPU, is on arXiv and ePrint.https://antonioguimaraes.org/news/#2026-11-09-tutti-parallel-ckks-bootstrapping-in-undhttps://antonioguimaraes.org/news/#2026-11-09-tutti-parallel-ckks-bootstrapping-in-undMon, 09 Nov 2026 00:00:00 GMT<a href="https://antonioguimaraes.org/publications/tutti/">TUTTI</a>, parallel CKKS bootstrapping in under 3 ms on CPU, is on arXiv and ePrint.Tulva: Practical Asynchronous Threshold FHE accepted at IEEE S&P 2027.https://antonioguimaraes.org/news/#2026-10-16-tulva-practical-asynchronous-threshold-fhttps://antonioguimaraes.org/news/#2026-10-16-tulva-practical-asynchronous-threshold-fFri, 16 Oct 2026 00:00:00 GMT<a href="https://antonioguimaraes.org/publications/tulva/">Tulva: Practical Asynchronous Threshold FHE</a> accepted at IEEE S&amp;P 2027.Batch, Pack, and Prove: More Efficient Verifiable Computation for CKKS accepted at ASIACRYPT 2026.https://antonioguimaraes.org/news/#2026-08-15-batch-pack-and-prove-more-efficient-verihttps://antonioguimaraes.org/news/#2026-08-15-batch-pack-and-prove-more-efficient-veriSat, 15 Aug 2026 00:00:00 GMT<a href="https://antonioguimaraes.org/publications/batch-pack-prove/">Batch, Pack, and Prove: More Efficient Verifiable Computation for CKKS</a> accepted at ASIACRYPT 2026.PETCHA, post-quantum transciphering with ChaCha, is on ePrint and accepted at PQCrypto 2026.https://antonioguimaraes.org/news/#2026-01-23-petcha-post-quantum-transciphering-with-https://antonioguimaraes.org/news/#2026-01-23-petcha-post-quantum-transciphering-with-Fri, 23 Jan 2026 00:00:00 GMT<a href="https://antonioguimaraes.org/publications/petcha/">PETCHA</a>, post-quantum transciphering with ChaCha, is on ePrint and accepted at PQCrypto 2026.Nostalgia Cipher accepted at IACR ToSC 2025: filtered LFSRs for hybrid homomorphic encryption with sub-50 ms latency.https://antonioguimaraes.org/news/#2025-11-23-nostalgia-cipher-accepted-at-iacr-tosc-2https://antonioguimaraes.org/news/#2025-11-23-nostalgia-cipher-accepted-at-iacr-tosc-2Sun, 23 Nov 2025 00:00:00 GMT<a href="https://antonioguimaraes.org/publications/nostalgia-cipher/">Nostalgia Cipher</a> accepted at IACR ToSC 2025: filtered LFSRs for hybrid homomorphic encryption with sub-50 ms latency.Awarded a Juan de la Cierva postdoctoral fellowship by the Spanish Ministry of Science.https://antonioguimaraes.org/news/#2025-10-20-awarded-a-juan-de-la-cierva-postdoctoralhttps://antonioguimaraes.org/news/#2025-10-20-awarded-a-juan-de-la-cierva-postdoctoralMon, 20 Oct 2025 00:00:00 GMTAwarded a <a href="https://antonioguimaraes.org/juan-de-la-cierva/">Juan de la Cierva postdoctoral fellowship</a> by the Spanish Ministry of Science.Presented Fast amortized bootstrapping with small keys at ACM CCS 2025 in Taipei.https://antonioguimaraes.org/news/#2025-10-13-presented-fast-amortized-bootstrapping-whttps://antonioguimaraes.org/news/#2025-10-13-presented-fast-amortized-bootstrapping-wMon, 13 Oct 2025 00:00:00 GMTPresented <a href="https://antonioguimaraes.org/publications/fast-amortized-bootstrapping/">Fast amortized bootstrapping with small keys</a> at ACM CCS 2025 in Taipei.Verifiable Computation for Approximate Homomorphic Encryption Schemes presented at CRYPTO 2025.https://antonioguimaraes.org/news/#2025-08-17-verifiable-computation-for-approximate-hhttps://antonioguimaraes.org/news/#2025-08-17-verifiable-computation-for-approximate-hSun, 17 Aug 2025 00:00:00 GMT<a href="https://antonioguimaraes.org/publications/verifiable-approximate-he/">Verifiable Computation for Approximate Homomorphic Encryption Schemes</a> presented at CRYPTO 2025.Homomorphic WiSARDs, encrypted training of weightless neural networks, presented at ACNS 2025.https://antonioguimaraes.org/news/#2025-06-23-homomorphic-wisards-encrypted-training-ohttps://antonioguimaraes.org/news/#2025-06-23-homomorphic-wisards-encrypted-training-oMon, 23 Jun 2025 00:00:00 GMT<a href="https://antonioguimaraes.org/publications/homomorphic-wisards/">Homomorphic WiSARDs</a>, encrypted training of weightless neural networks, presented at ACNS 2025.Secure and efficient transciphering for FHE-based MPC published in IACR TCHES 2025(3).https://antonioguimaraes.org/news/#2025-06-05-secure-and-efficient-transciphering-for-https://antonioguimaraes.org/news/#2025-06-05-secure-and-efficient-transciphering-for-Thu, 05 Jun 2025 00:00:00 GMT<a href="https://antonioguimaraes.org/publications/transciphering-fhe-mpc/">Secure and efficient transciphering for FHE-based MPC</a> published in IACR TCHES 2025(3).HELIOPOLIS, verifiable computation over encrypted data from IOPs, presented at ASIACRYPT 2024.https://antonioguimaraes.org/news/#2024-12-09-heliopolis-verifiable-computation-over-ehttps://antonioguimaraes.org/news/#2024-12-09-heliopolis-verifiable-computation-over-eMon, 09 Dec 2024 00:00:00 GMT<a href="https://antonioguimaraes.org/publications/heliopolis/">HELIOPOLIS</a>, verifiable computation over encrypted data from IOPs, presented at ASIACRYPT 2024.Best Ph.D. thesis award at the 25th Brazilian Symposium on High-Performance Computing Systems (WSCAD 2024).https://antonioguimaraes.org/news/#2024-01-01-best-ph-d-thesis-award-at-the-25th-brazihttps://antonioguimaraes.org/news/#2024-01-01-best-ph-d-thesis-award-at-the-25th-braziMon, 01 Jan 2024 00:00:00 GMTBest Ph.D. thesis award at the 25th Brazilian Symposium on High-Performance Computing Systems (WSCAD 2024).Joined the IMDEA Software Institute in Madrid as a postdoctoral researcher.https://antonioguimaraes.org/news/#2023-01-01-joined-the-imdea-software-institute-in-mhttps://antonioguimaraes.org/news/#2023-01-01-joined-the-imdea-software-institute-in-mSun, 01 Jan 2023 00:00:00 GMTJoined the IMDEA Software Institute in Madrid as a postdoctoral researcher.