HE Contexts#

There are different HEContext objects that abstract the various libraries.

Library	HEContexts
HEaaN	HeaanContext
HElib	HelibBgvContext, HelibBitwiseBgvContext HelibCkksContext
Lattigo	LattigoContext
OpenFHE	OpenFheCkksContext
Palisade	PalisadeCkksContext, PalisadeTfheContext
SEAL	SealCkksContext

Research and debug classes#

In addition to the standard contexts, HElayers provides two contexts listed below that were design to assist a developer researching and debugging its FHE program.

Class name	Description
MockupContext	A mockup implementation of HeContext without any cryptography. It allows fast runs for testing.
DebugContext	An implementation of HeContext that allows comparing other HeContexts. It is configured with two other pre-initialized HeContext objects (e.g., one for a cryptographic library and one for the mockup), delegates all calls to both of them, and compares the results. Useful for example for tracing CKKS noise, to see which steps cause it to build up the most, or to detect problems in the HE system configuration, pinpointing where the computation goes wrong.

Class name

Description

MockupContext

A mockup implementation of HeContext without any cryptography. It allows fast runs for testing.

DebugContext

An implementation of HeContext that allows comparing other HeContexts. It is configured with two other pre-initialized HeContext objects (e.g., one for a cryptographic library and one for the mockup), delegates all calls to both of them, and compares the results. Useful for example for tracing CKKS noise, to see which steps cause it to build up the most, or to detect problems in the HE system configuration, pinpointing where the computation goes wrong.