HHE Kombat: Benchmarking Hybrid Homomorphic Encryption Schemes

Authors:Hossein Abdinasibfar, Camille Nuoskala and Antonis Michalas
Venue: Proceedings of the 31st European Symposium on Research in Computer Security (ESORICS).
Where: Rome, Italy, September 14—18, 2026.

SPiRiT: Verifiable Contact Tracing for Balanced Security, Privacy, and Safety

Authors: Reyhaneh Rabaninejad, Azra Abtahi, Antonis Michalas and Amir Aminifar
Venue: Proceedings of the The 21st International Conference on Availability, Reliability and Security (ARES).
Where: Linköping, Sweden, August 24—27, 2026.

Coercion-Resistant Voting via Anamorphic Encryption

Authors: Antonis Michalas
Venue: Proceedings of the 31st ACM Symposium on Access Control Models and Technologies (SACMAT).
Where: Waterloo, Canada, July 08—10, 2026.
OA & Research Artifacts: PDF

PIOP-based SNARKs for General Computation

Authors: Yonghui Guan, Rihe Zhang, Bin Liu, Jialu Hao, Tianyu Zhao and Antonis Michalas
Venue: Proceedings of the 13th ACM ASIA Public-Key Cryptography Workshop co-located with the ACM ASIA Conference on Computer and Communications Security (ASIACCS).
Where: Bangalore, India, June 02, 2026.
OA & Research Artifacts: PDF

Hidden Elo: Private Matchmaking through Encrypted Rating Systems

Authors: Mindaugas Budzys, Bin Liu and Antonis Michalas
Venue: Proceedings of the 16th ACM Conference on Data and Application Security and Privacy (CODASPY).
Where: Frankfurt, Germany, June 23—25, 2026.
OA & Research Artifacts: PDF

It Runs and it Hides: A Function-Hiding Construction for Private-Key Multi-Input Functional Encryption

Authors: Antonis Michalas and Alexandros Bakas
Venue: Proceedings of the 12th International Conference on Information Systems Security and Privacy (ICISSP).
Where: Marbella, Spain, March 4—6, 2026.
OA & Research Artifacts: PDF

Oops!... They Stole it Again: Attacks on Split Learning

Authors: Tanveer Khan and Antonis Michalas
Venue: Proceedings of the 18th ACM Workshop on Artificial Intelligence and Security (AISec), co-located with the 32nd ACM Conference on Computer and Communications Security (CCS).
Where: Taipei, Taiwan, October 17, 2025.
OA & Research Artifacts: PDF

The Sound of Reduction: Minimal Inputs, Maximal Coverage

Authors: Iaroslav Gridin, Antonis Michalas. and Alejandro Cabrera Aldaya
Venue: 24th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom'25).
Where: Guiyang, China, 14—17 November 2025.

A Privacy-Centric Approach: Scalable and Secure Federated Learning Enabled by Hybrid Homomorphic Encryption

Authors: Khoa Nguyen, Tanveer Khan, Hossein Abdinasibfar and Antonis Michalas.
Venue: Proceedings of the Workshop on Responsible Healthcare using Machine Learning (RHCML), co-located with theEuropean Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD'25).
Where: Porto, Portugal 15—19 September 2025.
OA & Research Artifacts: PDF, CODE

Split Happens: Combating Advanced Threats with Split Learning and Function Secret Sharing

Authors: Tanveer Khan, Mindaugas Budzys and Antonis Michalas
Venue: 13th IEEE Conference on Communications and Network Security (CNS).
Where: Avignon, France, September 8—11, 2025.
OA & Research Artifacts: PDF, CODE

Blind Brother: Attribute-Based Selective Video Encryption

Authors: Eugene Frimpong, Bin Liu, Camille Nuoskala and Antonis Michalas
Venue: 15th ACM Conference on Data and Application Security and Privacy (CODASPY'25).
Where: Pittsburgh, PA, USA, June 4—6, 2025.
OA & Research Artifacts: PDF

Rainbow Over Clouds: A Lightweight Pairing-free Multi-Replica Multi-Cloud Public Auditing Scheme

Authors: Reyhaneh Rabaninejad, Antonis Michalas and Salil Kanhere
Venue: 19th International Conference on Risks and Security of Internet and Systems (CRiSIS'24).
Where: Aix-en-Provence, France, 26—28 November 2024.

A Pervasive, Efficient and Private Future: Realizing Privacy-Preserving Machine Learning Through Hybrid Homomorphic Encryption

Authors: Khoa Nguyen, Mindaugas Budzys, Eugene Frimpong, Tanveer Khan and Antonis Michalas.
Venue: 22nd IEEE International Conference on Dependable, Autonomic and Secure Computing (DASC'24).
Where: Boracay Island, Malay, Philippines, 5—8 November 2024.
OA & Research Artifacts: PDF, CODE A, CODE B

SPADE: Digging into Selective and PArtial DEcryption using Functional Encryption

Authors: Camille Nuoskala, Hossein Abdinasibfar and Antonis Michalas.
Venue: 20th EAI International Conference on Security and Privacy in Communication Networks (SecureComm’24).
Where: Dubai, UAE, 28—30 October 2024.
OA & Research Artifacts: PDF, CODE

Point Intervention: Improving ACVP Test Vector Generation Through Human Assisted Fuzzing

Authors: Iaroslav Gridin and Antonis Michalas.
Venue: 26th International Conference on Information and Communications Security (ICICS'24).
Where: 26—28 August, 2024, Mytilene, Greece.
OA & Research Artifacts: PDF, CODE

Wildest Dreams: Reproducible Research in Privacy-Preserving Neural Network Training

Authors: Tanveer Khan, Mindaugas Budzys, Khoa Nguyen and Antonis Michalas.
Venue: 24th Privacy Enhancing Technologies Symposium (PoPETs'24).
Where: 15—20 July, 2024, Bristol, U.K.
OA & Research Artifacts: PDF

FE[r]Chain: Enforcing Fairness in Blockchain Data Exchanges Through Verifiable Functional Encryption

Authors: Camille Foucault, Reyhaneh Rabbaninejad, Tassos Dimitriou and Antonis Michalas.
Venue: 29th ACM Symposium on Access Control Models and Technologies (SACMAT).
Where: 15—17 May, 2024, San Antonio, Texas, USA.
OA & Research Artifacts: PDF

Make Split, not Hijack: Preventing Feature-Space Hijacking Attacks in Split Learning

Authors: Tanveer Khan, Mindaugas Budzys and Antonis Michalas.
Venue: 29th ACM Symposium on Access Control Models and Technologies (SACMAT).
Where: 15—17 May, 2024, San Antonio, Texas, USA.
OA & Research Artifacts: PDF, CODE

Need for Speed: Leveraging the Power of Functional Encryption for Resource-Constrained Devices

Authors: Eugene Frimpong, Alexandros Bakas, Camille Foucault and Antonis Michalas.
Venue: 9th International Conference on IoT, BigData and Security (IoTBDS’24).
Where: 28—30 April 2024, Angers, France.
OA & Research Artifacts: PDF, CODE

Trustworthiness of X Users: A One-Class Classification Approach

Authors: Tanveer Khan, Fahad Sohrab, Antonis Michalas and Moncef Gabbouj.
Venue: 38th International Conference on Advanced Information Networking and Applications (AINA-2024).
Where: 19—17 April, 2024, Kitakyushu, Japan.
OA & Research Artifacts: PDF, CODE, DATASET

GuardML: Efficient Privacy-Preserving Machine Learning Services Through Hybrid Homomorphic Encryption

Authors: Eugene Frimpong, Khoa Nguyen, Mindaugas Budzys, Tanveer Khan and Antonis Michalas.
Venue: 39th ACM/SIGAPP Symposium On Applied Computing (SAC'24).
Where: 8—12 April, 2024, Avila, Spain.
OA & Research Artifacts: PDF, CODE A, CODE B

A More Secure Split: Enhancing the Security of Privacy-Preserving Split Learning

Authors: Tanveer Khan, Khoa Nguyen and Antonis Michalas.
Venue: 28th Nordic Conference on Secure IT Systems (NordSec'23).
Where: 16—17 November 2023, Oslo, Norway.
OA & Research Artifacts: PDF, CODE

Learning in the Dark: Privacy-Preserving Machine Learning using Function Approximation

Authors: Tanveer Khan and Antonis Michalas.
Venue: 22nd IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom'23).
Where: 01—03 November 2023, Exeter, U.K.
OA & Research Artifacts: PDF, CODE

Split Without a Leak: Reducing Privacy Leakage in Split Learning

Authors: Khoa Nguyen, Tanveer Khan and Antonis Michalas.
Venue: 19th EAI International Conference on Security and Privacy in Communication Networks (SecureComm’23).
Where: Hong Kong SAR, Hong Kong, 19—21 October 2023.
OA & Research Artifacts: PDF, CODE

stoRNA: Stateless Transparent Proofs of Storage-time

Authors: Reyhaneh Rabbaninejad, Behzad Abdolmaleki, Giulio Malavolta, Antonis Michalas and Amir Nabi.
Venue: 28th European Symposium on Research in Computer Security (ESORICS'23).
Where: Hague, the Netherlands, September 25—29, 2023.
OA & Research Artifacts: PDF

Love or Hate? Share or Split? Privacy-Preserving Training Using Split Learning and Homomorphic Encryption

Authors: Tanveer Khan, Khoa Nguyen, Antonis Michalas and Alexandros Bakas.
Venue: 20th Annual International Conference on Privacy, Security & Trust (PST'23).
Where: Copenhagen, Denmark, August 21—23, 2023.
OA & Research Artifacts: PDF, CODE

PoRt: Non-Interactive Continuous Availability Proof of Replicated Storage

Authors: Reyhaneh Rabbaninejad, Bin Liu and Antonis Michalas.
Venue: 38th ACM/SIGAPP Symposium On Applied Computing (SAC'23).
Where: Tallinn, Estonia, March 27—April 2, 2023.
OA & Research Artifacts: PDF

A Secure Bandwidth-Efficient Treatment for Dropout-Resistant Time-Series Data Aggregation

Authors: Reyhaneh Rabbaninejad, Bin Liu and Antonis Michalas.
Venue: Workshop on Privacy Preserving Computation in Pervasive Computing (PrivaCom'23) in conjunction with IEEE International Conference on Pervasive Computing and Communications (PerCom 2023).
Where: 13—17 March, 2023, Atlanta, USA.
OA & Research Artifacts: PDF

Split Ways: Privacy-Preserving Training of Encrypted Data Using Split Learning

Authors: Tanveer Khan, Nguyen and Antonis Michalas.
Venue: Workshop on Health Data Management in the Era of AI (HeDAI'23) in conjunction with EDBT/ICDT 2023.
Where: 28—31 March, 2023, Ioannina, Greece.
OA & Research Artifacts: PDF

Cryptographic Role-Based Access Control, Reconsidered

Authors: Bin Liu, Antonis Michalas and Bogdan Warinschi.
Venue: 16th International Conference on Provable and Practical Security (ProvSec’22)
Where: 11—12 November 2022, Nanjing, China.
OA & Research Artifacts: PDF

MetaPriv: Acting in Favor of Privacy on Social Media Platforms

Authors: Robert Cantaragiu, Antonis Michalas, Eugene Frimpong and Alexandros Bakas.
Venue: 18th EAI International Conference on Security and Privacy in Communication Networks (SecureComm’22).
Where: 17—19 October 2022, Kansas City, United States.
OA & Research Artifacts: PDF, CODE

Symmetrical Disguise: Realizing Homomorphic Encryption Services from Symmetric Primitives

Authors: Alexandros Bakas, Eugene Frimpong and Antonis Michalas.
Venue: 18th EAI International Conference on Security and Privacy in Communication Networks (SecureComm’22).
Where: 17—19 October 2022, Kansas City, United States.
OA & Research Artifacts: PDF, CODE

Feel the Quantum Functioning: Instantiating Generic Multi-Input Functional Encryption from Learning with Errors

Authors: Alexandros Bakas, Antonis Michalas, Eugene Frimpong and Reyhaneh Rabbaninejad.
Venue: 36th Annual WG 11.3 Conference on Data and Applications Security and Privacy (DBSec’22).
Where: 18—20 July 2022, Newark, NJ, USA.
OA & Research Artifacts: PDF, CODE

Private Lives Matter: A Differential Private Functional Encryption Scheme

Authors: Alexandros Bakas, Antonis Michalas and Tassos Dimitriou.
Venue: 12th ACM Conference on Data and Application Security and Privacy (CODASPY'22).
Where: 24—26 April 2022, Baltimore-Washington DC Area, United States.
OA & Research Artifacts: PDF

Attestation Waves: Platform Trust via Remote Power Analysis

Authors: Ignacio M. Delgado-Lozano, Macarena C. Martínez-Rodríguez, Alexandros Bakas, Billy Brumley and Antonis Michalas.
Venue: 20th International Conference on Cryptology and Network Security (CANS’21), December 13–15, 2021
Where: 13—15 December 2021, Vienna, Austria.
OA & Research Artifacts: PDF

Nowhere to Leak: A Multi-Client Forward and Backward Private Symmetric Searchable Encryption Scheme

Authors: Alexandros Bakas and Antonis Michalas.
Venue: 35th Annual WG 11.3 Conference on Data and Applications Security and Privacy (DBSec’21).
Where: 19—20 July 2021, Calgary, Canada.
OA & Research Artifacts: PDF, CODE

Arrows in a Quiver: A Secure Certificateless Group Key Distribution Protocol for Drones

Authors: Eugene Frimpong, Reyhaneh Rabbaninejad and Antonis Michalas.
Venue: 26th Nordic Conference on Secure IT Systems (NordSec'21).
Where: 29—30 November 2021, Tampere University (Virtual Event).
OA & Research Artifacts: PDF, CODE

Blind Faith: Privacy-Preserving Machine Learning Using Function Approximation

Authors: Tanveer Khan, Alexandros Bakas and Antonis Michalas.
Venue: 26th IEEE International Conference on Communications (ISCC’21).
Where: 05—08 October 2021, Athens, Greece.
OA & Research Artifacts: PDF, CODE

(F)unctional Sifting: A Privacy-Preserving Reputation

Authors: Alexandros Bakas, Antonis Michalas, and Amjad Ullah
Venue: 25th Nordic Conference on Secure IT Systems (NordSec'20).
Where: 23—25 November 2020, Virtual Event.
OA & Research Artifacts: PDF

Multi-Input Functional Encryption: Efficient Applications from Symmetric Primitives

Authors: Alexandros Bakas and Antonis Michalas.
Venue: 19th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom'20).
Where: December 29, 2020—January 01, Guangzhou, China.
OA & Research Artifacts: PDF

Trust and Believe — Should We? Evaluating the Trustworthiness of Twitter Users

Authors: Tanveer Khan and Antonis Michalas.
Venue: 19th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom'20)
Where: December 29, 2020—January 01, Guangzhou, China.

Attribute-Based Symmetric Searchable Encryption

Authors: Hai-Van Dang, Amjad Ullah, Alexandros Bakas and Antonis Michalas.
Venue: 2nd Workshop on Cloud Security and Privacy (Cloud S&P) in Conjunction with the 18th International Conference on Applied Cryptography and Network Security (ACNS’20).
Where: 19—22 October 2020, Rome, Italy (Virtual Event).
OA & Research Artifacts: PDF, CODE

Power Range: Forward Private Multi-Client Symmetric Searchable Encryption with Range Queries

Authors: Alexandros Bakas and Antonis Michalas.
Venue: 25th IEEE International Conference on Communications (ISCC’20).
Where: 07—10 July 2020, Rennes, France (Virtual Event).
OA & Research Artifacts: PDF, Presentation

Do not tell me what I cannot do! (The constrained device shouted under the cover of the fog): Implementing Symmetric Searchable Encryption on Constrained Devices

Authors: Eugene Frimpong, Alexandros Bakas, Hai-Van Dang and Antonis Michalas.
Venue: 5th International Conference on IoT, BigData and Security (IoTBDS’20).
Where: 07—09 May 2020, Prague, Czech Republic (Virtual Event).
OA & Research Artifacts: PDF, CODE

IoT-CryptoDiet: Implementing a Lightweight Cryptographic Library based on ECDH and ECDSA for the Development of Secure and Privacy-Preserving Protocols in Contiki-NG

Authors: Eugene Frimpong and Antonis Michalas.
Venue: 5th International Conference on IoT, BigData and Security (IoTBDS’20).
Where: 07—09 May 2020, Prague, Czech Republic (Virtual Event).
OA & Research Artifacts: PDF, CODE

SeCon-NG: Implementing a Lightweight Cryptographic Library based on ECDH and ECDSA for the Development of Secure and Privacy-Preserving Protocols in Contiki-NG

Authors: Eugene Frimpong and Antonis Michalas.
Venue: 35th ACM/SIGAPP Symposium On Applied Computing (SAC'20).
Where: March 30—April 3, 2020, Brno, Czech Republic (Virtual Event).
OA & Research Artifacts: PDF

Charlie and the CryptoFactory: Towards Secure and Trusted Manufacturing Environments

Authors: Antonis Michalas and Tamas Kiss
Venue: 20th IEEE Mediterranean Electrotechnical Conference (MELECON’20).
Where: 16—18 July, 2020, Palermo, Italy (Virtual Event).

MicroSCOPE: Enabling Access Control in Searchable Encryption with the use of Attribute-based Encryption and SGX

Authors: Antonis Michalas, Alexandros Bakas, Hai-Van Dang and Alexandr Zalitko
Venue: 24th Nordic Conference on Secure IT Systems (NordSec’19).
Where: 18—20 November, 2019, Aalborg, Denmark.
OA & Research Artifacts: PDF

Access Control in Searchable Encryption with the use of Attribute-Based Encryption and SGX

Authors: Antonis Michalas, Alexandros Bakas, Hai-Van Dang and Alexandr Zalitko
Venue: 10th ACM Cloud Computing Security Workshop (CCSW) in Conjunction with ACM Conference on Computer and Communications Security (CCS’19).
Where: 11—15 November, 2019, London, U.K.
OA & Research Artifacts: PDF

Modern Family: A Revocable Hybrid Encryption Scheme Based on Attribute-Based Encryption, Symmetric Searchable Encryption and SGX

Authors: Alexandros Bakas and Antonis Michalas
Venue: 15th EAI International Conference on Security and Privacy in Communication Networks (SecureComm’19)..
Where: 23—25, October, 2019, Orlando, United States.
OA & Research Artifacts: PDF

The Lord of the Shares: Combining Attribute-Based Encryption and Searchable Encryption for Flexible Data Sharing

Author: Antonis Michalas
Venue: 34th ACM/SIGAPP Symposium On Applied Computing (SAC'19).
Where: 08—12, April, 2019, Limassol, Cyprus, 2019, .
OA & Research Artifacts: PDF

Red Alert: Break-Glass Protocol to Access Encrypted Medical Records in the Cloud

Authors: Marcela Tuler de Oliveira, Antonis Michalas, Adrien E. D. Groot, Henk A. Marquering and Silvia Olabarriaga
Venue: 19th IEEE International Conference on E-health Networking, Application & Services (Healthcom'19).
Where: 14—16, October, 2019, Bogota, Colombia.

Towards Secure Cloud Orchestration for Multi-Cloud Deployments

Authors: Nicolae Paladi, Antonis Michalas and Hai-Van Dang.
Venue: 5th Workshop on CrossCloud Infrastructures & Platforms (CrossCloud’18) in Conjunction with EuroSys 2018.
Where: 23—26, April, 2018, Porto, Portugal.
OA & Research Artifacts: PDF

MemTri: A Memory Forensics Triage Tool using Bayesian Network and Volatility

Authors: Antonis Michalas and Rohan Murray.
Venue: 9th ACM CCS International Workshop on Managing Insider Security Threats (MIST’17) in Conjunction with ACM CCS 2017.
Where: October 30—03 November, 2017, Dallas, USA.
OA & Research Artifacts: PDF

Keep Pies Away from Kids: A Raspberry Pi Attacking Tool

Authors: Antonis Michalas and Ryan Murray.
Venue: 1st ACM CCS International Workshop on Internet of Things Security and Privacy (IoT S&P’17) in Conjunction with ACM CCS 2017.
Where: October 30—03 November, 2017, Dallas, USA.
OA & Research Artifacts: PDF

HealthShare: Using Attribute-Based Encryption for Secure Data Sharing Between Multiple Clouds

Authors: Antonis Michalas and Noam Weingarten.
Venue: 30th IEEE International Symposium on Computer-Based Medical Systems (CBMS’17).
Where: October 22—24 June, 2017, Thessaloniki, Greece.
OA & Research Artifacts: PDF

LocLess: Do You Really Care Your Cloud Files Are?

Authors: Antonis Michalas and Kassaye Yitbarek Yigzaw.
Venue: 9th IEEE/ACM International Conference on Utility and Cloud Computing.
Where: 12—15 December, 2016, Luxembourg.
OA & Research Artifacts: PDF

Sharing in the Rain: Secure and Efficient Data Sharing for the Cloud

Authors: Antonis Michalas
Venue: 11th International Conference for Internet Technology and Secured Transactions (ICITST’16).
Where: 05—07 December, 2016, Barcelona, Spain.
OA & Research Artifacts: PDF

Authors: Antonis Michalas and Rafael Dowsley.
Venue: 9th IEEE/ACM International Conference on Utility and Cloud Computing.
Where: 07—10 December, 2015, Limassol, Cyprus.
OA & Research Artifacts: PDF

PaaSword: A Holistic Data Privacy and Security by Design Framework for Cloud Services

Authors: Y. Verginadis, Antonis Michalas, P. Gouvas, G. Schiefer, G. Hubsch and I. Paraskakis
Venue: 5th International Conference on Cloud Computing and Services Science (CLOSER’15).
Where: 20—22 May, 2015, Lisbon, Portugal.
OA & Research Artifacts: PDF

Security Aspects of e-Health Systems Migration to the Cloud

Authors: Antonis Michalas, Nicolae Paladi and Christian Gehrmann
Venue: 16th IEEE International Conference on E-health Networking, Application & Services (Healthcom'14).
Where: 15—18 October, 2014, Natal, Brazil.
OA & Research Artifacts: PDF

Domain Based Storage Protection with Secure Access Control for the Cloud

Authors: Nicolae Paladi, Antonis Michalas and Christian Gehrmann
Venue: The 2014 International Workshop on Security in Cloud Computing, held in conjunction with the 9th ACM Symposium on Information, Computer and Communications Security (ASIACCS).
Where: 03—06 June, 2014, Kyoto, Japan.
OA & Research Artifacts: PDF

The Lord of the Sense: A Privacy Preserving Reputation System for Participatory Sensing Applications

Authors: Antonis Michalas, and Nikos Komninos
Venue: 19th IEEE International Conference on Communications (ISCC’2014).
Where: 23—26 June, 2014, Madeira, Portugal, 2014.
OA & Research Artifacts: PDF