It's a sparse random matrix, but definitely in the same family of techniques. I was concerned more about distributional properties of different hash functions

It's a sparse random matrix, but definitely in the same family of techniques. I was concerned more about distributional properties of different hash functions than reversibility. Checksums-as-hashes often work, but it's not that much work to swap in something a little more robust. If you want a good output distribution, pick something where that's a goal of the algorithm.