Approved Work Item
ISO/IEC AWI 28033-5
Fully homomorphic encryption — Part 5: Mechanisms for Scheme Switching
Reference number
ISO/IEC AWI 28033-5
Edition 1
© ISO 2025
Approved Work Item
Under development
A working group has prepared a draft.

Abstract

This document specifies mechanisms for switching of homomorphic encryption schemes based on Chimera framework and related optimizations. This section describes advanced constructions that rely on ciphertexts that have been defined for the FHE schemas BFV/BGV, CKKS and CGGI and use the same security levels. The main goal is to be able to convert LWE/RLWE/GLWE ciphertexts encrypted under the FHE schemas without decrypting them.

General information

  • Status
     : Under development
    Stage
    : New project registered in TC/SC work programme [20.00]
  • Edition
     : 1
  • Technical Committee :
    ISO/IEC JTC 1/SC 27
  • RSS updates

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