Paper 2021/080
Error Term Checking: Towards Chosen Ciphertext Security without Re-encryption
Jan-Pieter D'Anvers, Emmanuela Orsini, and Frederik Vercauteren
Abstract
Chosen ciphertext security for lattice based encryption schemes is generally achieved through a generic transformation such as the Fujisaki-Okamoto transformation. This method requires full re-encryption of the plaintext during decapsulation, which typically dominates the cost of the latter procedure. In this work we show that it is possible to develop alternative transformations specifically designed for lattice based encryption schemes. We propose two novel chosen ciphertext transformations,
Metadata
- Available format(s)
- Category
- Public-key cryptography
- Publication info
- Preprint. MINOR revision.
- Keywords
- Post-Quantum CryptographyLattice-based CryptographyChosen Ciphertext SecurityFujisaki-Okamoto transform
- Contact author(s)
-
janpieter danvers @ esat kuleuven be
emmanuela orsini @ esat kuleuven be
frederik vercauteren @ esat kuleuven be - History
- 2021-01-22: received
- Short URL
- https://ia.cr/2021/080
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2021/080, author = {Jan-Pieter D'Anvers and Emmanuela Orsini and Frederik Vercauteren}, title = {Error Term Checking: Towards Chosen Ciphertext Security without Re-encryption}, howpublished = {Cryptology {ePrint} Archive, Paper 2021/080}, year = {2021}, url = {https://eprint.iacr.org/2021/080} }