Progress in Cryptology - AFRICACRYPT 2025

This book constitutes the refereed proceedings of the 16th International Conference on Cryptology in Africa, AFRICACRYPT 2025, which took place in Rabat, Morocco in July 2025.

The 21 full papers presented in this volume were carefully reviewed and selected from 45 submissions.

They are grouped into the following topics: Homomorphic Encryption; Cryptanalysis of RSA; Cryptography Arithmetic; Side-channel Attacks; Designs; Cryptanalysis.

Inhalt

.- Homomorphic Encryption.

.- Convolution-Friendly Image Compression with FHE.

.- Leveled Homomorphic Encryption over Composite Groups.

.- Activate Me!: Designing Efficient Activation Functions for
Privacy-Preserving Machine Learning with Fully Homomorphic Encryption.

.- One-Way Homomorphic Encryption: A Composite Group Approach.

.- Cryptanalysis of RSA.

.- A Novel Partial Key Exposure Attack on Common Prime RSA.

.- Improved Cryptanalysis of an RSA Variant Based on Cubic Pell Curve.

.- A New Generalized Attack on RSA-like Cryptosystems.

.- Cryptography Arithmetic.

.- An Improvement of the Congruence Solver of Lattice Isomorphism
Problem over Totally Real Number Fields and Applications.

.- PMNS arithmetic for elliptic curve cryptography.

.- Constant-time Integer Arithmetic for SQIsign.

.- FPTRU:Optimization of NTRU-Prime and TLS Performance Assessment.

.- Side-channel Attacks.

.- Simple Power Analysis Attack on SQIsign.

.- Correlation power analysis of LESS and CROSS.

.- TPL: Power Leakage Model Based on Technology Library.

.- Designs.

.- Bivariate proximity test-based Asynchronous Verifiable Secret Sharing.

.- Behemoth: transparent polynomial commitment scheme with constant
opening proof size and verifier time.

.- Attribute-based Encryption using Sum-Product Decomposition of
Boolean Functions.

.- Simultaneously simple universal and indifferentiable hashing to elliptic
curves.

.- Cryptanalysis.

.- Conjunctive Dynamic SSE Schemes under Scrutiny: Exposing Privacy
Issues in SDSSE-CQ-S and VCDSSE.

.- Efficient and Optimized Modeling of S-Boxes.

.- Tearing Solutions for Tree Traversal in Stateful Hash-based Cryptography.