Efficient matrix key homomorphic encryption of medical images

A sure way of providing privacy to sensitive images is encrypt them, especially when they are stored in a public cloud server. Homomorphic encryption enables arithmetic operations over encrypted data without access the secret key. This facility can be well harnessed for secure outsourced image processing by exploiting available computational capabilities modern servers. paper presents new homomorphic scheme that uses integer matrix keys. The carried out finite field Zp avail advantages and limit cipher text sizes reasonable levels. Our method does not use any error vector as learning with errors (LWE) improve security.