In this presentation, we will explore the fascinating intersection of zero-knowledge proofs and blockchain technology. We will begin by demystifying zero-knowledge proofs, explaining their fundamental principles and tracing their evolution from theoretical primitives to practical tools in cryptography. Following this, we will delve into the world of blockchain, discussing its reliance on cryptographic techniques to ensure security and integrity. The core of the talk will focus on the necessity of zero-knowledge proofs in blockchain applications, addressing privacy and scalability concerns. We will highlight how blockchain technology has spurred significant advancements in zero-knowledge proof research, fostering collaboration between academia and industry. Finally, I will present my own contributions to the field, including the optimization of mathematical building blocks for zero-knowledge proofs and their concrete applications within blockchain systems. This presentation aims to provide a comprehensive understanding of the critical role zero-knowledge proofs play in enhancing blockchain technology and to share insights from cutting-edge research in this dynamic area.