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Encryption-based cyber threats continue to evolve, leveraging increasingly sophisticated cryptographic techniques to evade detection and persist within compromised systems. A hierarchical classification framework designed to analyze…

Cryptography and Security · Computer Science 2025-08-11 Dominic Abernethy , Nathaniel Weatherstone , Tristan Ravensdale , Lafedi Svet

Homomorphic encryption (HE) is a privacy-preserving technique that enables computation directly over ciphertext. Unfortunately, a key challenge for HE is that implementations can be impractically slow and have limits on computation that can…

Cryptography and Security · Computer Science 2022-03-08 Hsuan Hsiao , Vincent Lee , Brandon Reagen , Armin Alaghi

Implicit authentication consists of a server authenticating a user based on the user's usage profile, instead of/in addition to relying on something the user explicitly knows (passwords, private keys, etc.). While implicit authentication…

Cryptography and Security · Computer Science 2015-03-03 Josep Domingo-Ferrer , Qianhong Wu , Alberto Blanco-Justicia

In this paper, we propose the first homomorphic based proxy re-encryption (HPRE) solution that allows different users to share data they outsourced homomorphically encrypted using their respective public keys with the possibility to process…

Cryptography and Security · Computer Science 2017-06-07 Reda Bellafqira , Gouenou Coatrieux , Dalel Bouslimi , Gwénolé Quellec , Michel Cozic

We present GRAFHEN, a new cryptographic scheme which offers Fully Homomorphic Encryption without the need for bootstrapping (or in other words, without noise). Building on the work of Nuida and others, we achieve this using encodings in…

Cryptography and Security · Computer Science 2025-10-27 Pierre Guillot , Auguste Hoang Duc , Michel Koskas , Florian Méhats

Topological Data Analysis (TDA) offers a suite of computational tools that provide quantified shape features in high dimensional data that can be used by modern statistical and predictive machine learning (ML) models. In particular,…

Cryptography and Security · Computer Science 2023-07-06 Dominic Gold , Koray Karabina , Francis C. Motta

This paper proposes a non-interactive end-to-end solution for secure fusion and matching of biometric templates using fully homomorphic encryption (FHE). Given a pair of encrypted feature vectors, we perform the following ciphertext…

Computer Vision and Pattern Recognition · Computer Science 2022-08-16 Luke Sperling , Nalini Ratha , Arun Ross , Vishnu Naresh Boddeti

The technical literature about data privacy largely consists of two complementary approaches: formal definitions of conditions sufficient for privacy preservation and attacks that demonstrate privacy breaches. Differential privacy is an…

Cryptography and Security · Computer Science 2025-02-06 Mark Bun , Marco Carmosino , Palak Jain , Gabriel Kaptchuk , Satchit Sivakumar

The problem we address is the following: how can a user employ a predictive model that is held by a third party, without compromising private information. For example, a hospital may wish to use a cloud service to predict the readmission…

Machine Learning · Computer Science 2014-12-25 Pengtao Xie , Misha Bilenko , Tom Finley , Ran Gilad-Bachrach , Kristin Lauter , Michael Naehrig

The use of Neural Networks (NNs) for sensitive data processing is becoming increasingly popular, raising concerns about data privacy and security. Homomorphic Encryption (HE) has the potential to be used as a solution to preserve data…

Cryptography and Security · Computer Science 2023-05-04 Ivone Amorim , Eva Maia , Pedro Barbosa , Isabel Praça

Many Intelligent Transportation Systems (ITS) applications require strong privacy guarantees for both users and their data. Homomorphic encryption (HE) enables computation directly on encrypted messages and thus offers a compelling approach…

Cryptography and Security · Computer Science 2026-02-04 Kyle Yates , Abdullah Al Mamun , Mashrur Chowdhury

Homomorphic encryption has been an area of study in classical computing for decades. The fundamental goal of homomorphic encryption is to enable (untrusted) Oscar to perform a computation for Alice without Oscar knowing the input to the…

Quantum Physics · Physics 2020-09-02 Daniel O'Malley , John K. Golden

Federated learning has become increasingly widespread due to its ability to train models collaboratively without centralizing sensitive data. While most research on FL emphasizes privacy-preserving techniques during training, the evaluation…

Cryptography and Security · Computer Science 2025-08-12 Cem Ata Baykara , Ali Burak Ünal , Mete Akgün

We present a scheme for implementing homomorphic encryption on coherent states encoded using phase-shift keys. The encryption operations require only rotations in phase space, which commute with computations in the codespace performed via…

Quantum Physics · Physics 2018-04-11 Si-Hui Tan , Yingkai Ouyang , Peter P. Rohde

Federated learning enables collaborative model training across distributed institutions without centralizing sensitive data; however, ensuring algorithmic fairness across heterogeneous data distributions while preserving privacy remains…

Cryptography and Security · Computer Science 2026-02-16 Mohammed Himayath Ali , Mohammed Aqib Abdullah , Syed Muneer Hussain , Mohammed Mudassir Uddin , Shahnawaz Alam

This article presents the application of homomorphic authenticators, replication encodings to be precise, to multigroup fully homomorphic encryption schemes. Following the works of Gennaro and Wichs on homomorphic authenticators in…

Cryptography and Security · Computer Science 2023-03-16 Ramsès Fernàndez-València

The widespread deployment of products powered by machine learning models is raising concerns around data privacy and information security worldwide. To address this issue, Federated Learning was first proposed as a privacy-preserving…

In this paper, we introduce a privacy-preserving stable diffusion framework leveraging homomorphic encryption, called HE-Diffusion, which primarily focuses on protecting the denoising phase of the diffusion process. HE-Diffusion is a…

Cryptography and Security · Computer Science 2024-05-03 Yaojian Chen , Qiben Yan

The Machine Learning and Deep Learning Models require a lot of data for the training process, and in some scenarios, there might be some sensitive data, such as customer information involved, which the organizations might be hesitant to…

Machine Learning · Computer Science 2022-08-05 Syed Imtiaz Ahamed , Vadlamani Ravi

Embeddings, which compress information in raw text into semantics-preserving low-dimensional vectors, have been widely adopted for their efficacy. However, recent research has shown that embeddings can potentially leak private information…

Computation and Language · Computer Science 2022-10-07 Garam Lee , Minsoo Kim , Jai Hyun Park , Seung-won Hwang , Jung Hee Cheon