Cryptography and security researcher — Distinguished Member of Technical Staff (DMTS), Nokia Bell Labs. PhD in Electrical & Computer Engineering, University of Patras (2014). IEEE Senior Member.
I work on applied cryptography, post-quantum crypto, privacy preserving technologies (FHE), cryptographic hardware design, and lately on optimizing AI KV cache workloads. CTO level advisor for PQC migration.
- Post-quantum cryptography — NIST candidate evaluation, lattice-based schemes, post-quantum TLS 1.3, crypto-agility and migration planning
- Cryptographic hardware — NTT accelerators for lattice cryptography, VLSI/FPGA, TPM and hardware roots of trust, side-channel and fault-attack resistance
- Privacy-preserving computation — fully homomorphic encryption (CKKS), zero-knowledge proofs, privacy-preserving machine learning
- Network and systems security — 5G/6G and IoT security architecture, agentic AI security (DID / verifiable credentials)
- Co-author, IETF RFC 9958 — Post-Quantum Cryptography for Engineers
- Contributor, 3GPP SA3 / RAN2, ORAN and ETSI
- tumi8/pqs-tls-measurements — the artifact repository for The Performance of Post-Quantum TLS 1.3 (ACM CoNEXT 2023), which I co-authored. Measurement data, analysis and plotting for the post-quantum handshake study. Published by the TUM I8 chair under CC-BY-4.0.
- LEGO Robot-arm built with LEGO technics only, controlled with MQTT commands over WiFi with Node MCU and Adafruit Motor Shields. Used to demonstrate Cyber-Physical IoT security concepts.
- D. Schoinianakis et al., “Compressed FHE: Accelerating Encrypted Matrix Multiplication in CKKS with Precision-Balanced Low-Rank Factor Chains,” IACR Communications in Cryptology, Volume 3, Issue 2, 2026.
- G. Alexakis, D. Schoinianakis, G. Dimitrakopoulos, “High-performance NTT accelerators for PQC leveraging Unified Redundant Arithmetic and Fine-Tuned Microarchitecture,” Microprocessors and Microsystems, Volume 124, Part B, 2026.
- M. Sosnowski, D. Schoinianakis et al., "The Performance of Post-Quantum TLS 1.3," ACM CoNEXT, 2023 — OpenSSL instrumentation and kernel-level profiling of post-quantum handshakes
- D. Schoinianakis, "Residue arithmetic systems in cryptography: a survey," Journal of Cryptographic Engineering, 10(3), 2020
35+ peer-reviewed papers · 3 Springer research books · 900+ citations · 7 granted patents
Independent evaluator, EU Chips Joint Undertaking and the European Commission / ECCC. Advisory Board member, UK RISE Consortium.