Somewhat Homomorphic Encryption

In Partially Homomorphic encryption, we can perform either multiplication or addition that means both addition and multiplication cannot be performed simultaneously. But Somewhat Homomorphic encryption allows us to perform both operations at the same time. There are useful SWHE examples [Yao 1982; Sander et al. 1999; Boneh et al. 2005; Ishai and Paskin 2007] in the literature before 2009. There are several Somewhat Homomorphic Encryption (SWHE) are globally accepted. One of the popular methods is BGN encryption scheme. This scheme was developed by Beneh-Goh-Nissimb at Stanford University, which is also the first practical Somewhat Homomorphic Encryption. Before this encryption scheme, all the operations are limited to addition or multiplication only. This scheme gave a major advancement towards the practical Fully Homomorphic Encryption. This scheme gave a major advancement towards the practical Fully Homomorphic Encryption.