TFHE Public-Key Encryption Revisited

Marc Joye

Paper 2023/603

TFHE Public-Key Encryption Revisited

Marc Joye

, Zama

Abstract

This note introduces a public-key variant of TFHE. The output ciphertexts are of LWE type. Interestingly, the public key is shorter and the resulting ciphertexts are less noisy. The security of the scheme holds under the standard RLWE assumption. Several variations and extensions are also described.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint.
Keywords: Fully homomorphic encryption (FHE)Public-key encryption Ring LWE (RLWE)TFHE cryptosystem
Contact author(s): marc @ zama ai
History: 2023-04-28: approved; 2023-04-27: received; See all versions
Short URL: https://ia.cr/2023/603
License: CC BY

BibTeX

@misc{cryptoeprint:2023/603,
      author = {Marc Joye},
      title = {{TFHE} Public-Key Encryption Revisited},
      howpublished = {Cryptology {ePrint} Archive, Paper 2023/603},
      year = {2023},
      url = {https://eprint.iacr.org/2023/603}
}