Abstract
We present a fully homomorphic encryption scheme which has both relatively small key and ciphertext size. Our construction follows that of Gentry by producing a fully homomorphic scheme from a “somewhat” homomorphic scheme. For the somewhat homomorphic scheme the public and private keys consist of two large integers (one of which is shared by both the public and private key) and the ciphertext consists of one large integer. As such, our scheme has smaller message expansion and key size than Gentry’s original scheme. In addition, our proposal allows efficient fully homomorphic encryption over any field of characteristic two.
Translated title of the contribution | Fully Homomorphic Encryption with Relatively Small Key and Ciphertext Sizes |
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Original language | English |
Title of host publication | Public Key Cryptography - PKC 2010 |
Publisher | Springer Berlin Heidelberg |
Pages | 420-443 |
Volume | 6056 |
Publication status | Published - 2010 |
Bibliographical note
Other page information: 420-443Conference Proceedings/Title of Journal: Public Key Cryptography - PKC 2010
Other identifier: 2001176