Privacy tech is about to become a major conversation topic in the Ethereum ecosystem through 2026 and beyond. Two technologies are leading the charge: Zero-Knowledge Proofs (ZK) and Fully Homomorphic Encryption (FHE). If these terms haven't crossed your radar yet, here's what matters—they're reshaping how blockchain handles sensitive data. ZK lets you prove something is true without revealing the underlying information. FHE takes it further, enabling computations on encrypted data without ever decrypting it. Both are game-changers for building truly private blockchain applications. Whether you're a developer or investor, understanding these privacy-preserving technologies is becoming essential.