Among several approaches to privacy-preserving cryptographic schemes. we have concentrated on noise-free homomorphic encryption. It is a symmetric key encryption that supports homomorphic operations on encrypted data. We present a fully homomorphic encryption (FHE) scheme based on sedenion algebra over finite ℤn rings. https://www.roneverhart.com/Cyspera-Pigment-Corrector-1-75oz-52ml/