Paper 2017/163

Homomorphic Encryption without Gaussian Noise

Anamaria Costache and Nigel P. Smart


We propose a Somewhat Homomorphic Encryption (SHE) scheme based on the Learning With Rounding (LWR) problem. The LWR problem is somewhat similar to the more classical Learning With Errors (LWE) and was proposed as a deterministic variant of it and setting up an LWR instance does not require the generation of gaussian noise. Thus our SHE scheme can be instantiated without the need for expensive Gaussian noise sampling. Our initial scheme provides lower ciphertext sizes for small plaintext spaces than existing leading schemes such as BGV.

Available format(s)
Publication info
Preprint. MINOR revision.
Contact author(s)
anamaria costache @ bristol ac uk
nigel @ cs bris ac uk
2017-02-23: received
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Creative Commons Attribution


      author = {Anamaria Costache and Nigel P.  Smart},
      title = {Homomorphic Encryption without Gaussian Noise},
      howpublished = {Cryptology ePrint Archive, Paper 2017/163},
      year = {2017},
      note = {\url{}},
      url = {}
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