This book constitutes the refereed proceedings of the Cryptographer's Track at the RSA Conference 2025, CT-RSA 2025, held in San Francisco, CA, USA, during April 28–May 1, 2025.

The 17 full papers presented in this volume were carefully reviewed and selected from 49 submissions. They were organized in topical sections as follows: Cryptanalysis; Public-Key Cryptography; Hardware and Software Implementations; Symmetric-Key Cryptography; Multiparty Computation and Zero-Knowledge; White-box Crypto.