Open-sourcing homomorphic hashing to secure update propagation

What this post added

Introduced LtHash, a homomorphic hashing algorithm based on lattice cryptography, for secure and scalable update propagation in configuration management systems. This addresses the challenges of maintaining data integrity across a large network of peers by enabling efficient recomputation of database hashes after updates, without iterating over the entire database. The implementation is open-sourced in Folly.