A novel secure biomedical data aggregation using fully homomorphic encryption in WSN

A new method of secure data aggregation for decimal having integer as well fractional part using homomorphic encryption is described. The proposed provides addition, subtraction, multiplication, division and averaging operations in the cipher domain both positive negative numbers. scheme uses matrices finite field Zp decryption keys. An embedded Digital signature along with integrity authentication by verification at receiving end. immune to chosen plaintext ciphertext attacks. In case expansion ratio grows linearly size. computational complexity multiplication relatively less 22.87% compared Brakerski Vaikantanathan when size ten digits.