HElib: src/FHE.h File Reference

HElib 1.0 Implementing Homomorphic Encryption

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FHE.h File Reference

Public/secret keys for the BGV cryptosystem. More...

`#include <vector>`
`#include "NTL/ZZX.h"`
`#include "DoubleCRT.h"`
`#include "FHEContext.h"`
`#include "Ctxt.h"`

Go to the source code of this file.

## Classes
class | KeySwitch
| Key-switching matrices. More...
class | FHEPubKey
| The public key. More...
class | FHESecKey
| The secret key. More...

## Functions
ostream & | operator<< (ostream &str, const KeySwitch &matrix)
Strategies for generating key-switching matrices
These functions are implemented in KeySwitching.cpp
void | addAllMatrices (FHESecKey &sKey, long keyID=0)
| Maximalistic approach: generate matrices s(X^e)->s(X) for all e in Zm*.
void | addFewMatrices (FHESecKey &sKey, long keyID=0)
| Generate matrices so every s(X^e) can be reLinearized in at most two steps.
void | add1DMatrices (FHESecKey &sKey, long keyID=0)
| Generate all matrices s(X^{g^i})->s(X) for generators g of Zm* /(p) and i<ord(g). If g has different orders in Zm* and Zm* /(p) then generate also matrices of the form s(X^{g^{-i}})->s(X)
void | addSome1DMatrices (FHESecKey &sKey, long bound=100, long keyID=0)
| Generate some matrices of the form s(X^{g^i})->s(X), but not all. For a generator g whose order is larger than bound, generate only enough matrices for the giant-step/baby-step procedures (2*sqrt(ord(g))of them).
void | addFrbMatrices (FHESecKey &sKey, long keyID=0)
| Generate all Frobenius matrices of the form s(X^{2^i})->s(X)

## Detailed Description

Public/secret keys for the BGV cryptosystem.