This cluster details the latest research in cryptography, particularly focusing on post-quantum privacy and one-shot signatures using quantum methods. It discusses the creation of a Traceable Receipt-free Encryption (TREnc) scheme that resists quantum adversaries, addressing a critical limitation of existing mechanisms. Also it explains the use of quantum methods for unclonable private keys and the application of cryptography to protect personal data. The discussion also delves into the use of Verifiable Delay Functions (VDFs) to enhance blockchain technology. This cluster highlights recent breakthroughs in cryptographic protocols that aim to be resilient to quantum computing attacks.