Dayane Horkos
Cryptography Researcher · Paris
Researcher at the intersection of cybersecurity, cryptography, and applied mathematics. My work focuses on enhancing multi-cloud storage security — ensuring data confidentiality, availability, and integrity across distributed platforms. Passionate about the mathematical foundations of cryptography and committed to advancing secure data management.
Research
PhD Thesis — in progress
My PhD explores cryptographic foundations for secure multi-cloud storage. As dependence on single cloud providers raises growing concerns around confidentiality, availability, and trust, multi-cloud architectures offer a distributed alternative in which data is shared across several providers. This shift redefines classical cryptographic assumptions, moving from centralized protection models to decentralized trust settings. The thesis is structured around two main directions: designing new protocols for multi-cloud storage, and developing novel cryptographic primitives adapted to the constraints of these distributed environments.
Research Interests
Publications
SoK: On Cryptography for Multi-Cloud Storage
A Systematization of Knowledge on cryptographic techniques in Multi-Cloud Storage. Classifies existing MCS approaches along two dimensions — architectural trust models and the cryptographic primitives used to achieve confidentiality, integrity, availability, access control, and auditability. Introduces a unified taxonomy, highlights recurring design patterns, and identifies open research gaps.
Talks & Blogs
SoK: On Cryptography for Multi-Cloud Storage
Join me at RSAC 2026 Conference, taking place March 23–26 in San Francisco. This year’s theme, The Power of Community, celebrates how collaboration turns ideas into breakthroughs and challenges into opportunities. Engage with the RSAC community and gain deeper insights into today’s cybersecurity challenges.
Cryptography for Multi-Cloud Storage
Presentation of ongoing research on cryptographic protocols for secure multi-cloud storage systems, focusing on distributed trust models and cryptographic constructions enabling confidentiality and availability across multiple cloud providers.
Adversarial Models in Cryptography
Introduction to adversarial models used in modern cryptography and how they shape the security definitions and proofs of cryptographic protocols. The article explains common adversarial settings and their role in modern cryptographic security analysis.
Experience
PhD Cryptography Researcher
Research on the design and analysis of cryptographic protocols for secure multi-cloud storage systems. My work investigates how cryptographic primitives can be combined with distributed cloud architectures to ensure data confidentiality, availability, and integrity without relying on a single trusted provider. This includes the development of new multi-cloud storage schemes, threshold constructions, and formal security models for decentralized storage environments. Joined Astran in March 2024 as an R&D intern before continuing as a CIFRE PhD researcher.
Teaching Assistant (TD Instructor) — Chiffrement et Codes
Teaching assistant for the course "Chiffrement et Codes", an introduction to modern cryptography and the mathematical foundations underlying cryptographic algorithms. The course covers mechanisms ensuring confidentiality, authenticity, and data integrity, introduces basic cryptanalysis through simple attack algorithms, and provides a first overview of post-quantum cryptography.
Education
PhD in Cryptography (CIFRE)
Research on cryptographic protocols for secure multi-cloud storage systems.
Master's in Applied Algebra & Cryptography
IDEX Excellence Scholarship.
Bachelor's in Mathematics
Baccalauréat — General Sciences
Skills & Languages
Programming
Rust, C, C++, SageMath, Python
Writing & Tools
LaTeX, Git
Volunteer
Lebanese Red Cross — Youth Section, since 2018