Notes on Two Fully Homomorphic Encryption Schemes Without Bootstrapping.
Yongge Wang · IACR Cryptology ePrint Archive · 2015
Recently, IACR ePrint archive posted two fully homomorphic encryption schemes without bootstrapping. In this note, we show that these schemes are trivially insecure. Furthermore, we also show that the encryption schemes of Liu and Wang [6] in CCS 2012 and the encryption scheme of Liu, Bertino, and Xun [5] in ASIACCS 2014 are insecure either.