Enhancing ZeroTrustSQL with Transactions, Caching, Advanced Joins, Update/Delete Operations, and Logging

Introduction

In Part 1 of this series, we introduced the foundations of building a privacy-preserving database using Homomorphic Encryption (HE) and Zero-Knowledge Proofs (ZKP). We created a database that could securely store encrypted data, perform operations on it, and verify the results without revealing the underlying data.

Implementing Homomorphic Encryption and Zero-Knowledge Proofs for Secure SQL Operations

In this part, we will take the project to the next level by introducing transaction management, query caching, logging/auditing, and more sophisticated SQL operations like JOIN variants (LEFT, RIGHT, OUTER) — all while maintaining the privacy guarantees provided by encryption and zero-knowledge proofs.

Enhancing Transaction Management for Data Integrity

The Importance of Transactions in Databases

In any database, transactions ensure that multiple operations are grouped into a single unit of work. This grouping…