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SEAL

About

I tried out SEAL, a library for homomorphic encryption published by Microsoft. The idea is to install it on a laptop and run a simple example.

The SEAL library is written in C++.

SEAL documentation

Download and compile the library

I'm following the instructions for MacOS and Linux in the SEAL README.md.

MacOS and Ubuntu

Prerequisites are cmake and a new compiler, a modern version of GNU G++ (>= 6.0) or Clang++ (>= 5.0) is needed. In macOS the Xcode toolchain (>= 9.3) will work. Microsoft SEAL compiled with Clang++ has much better runtime performance than that compiled with GNU G++.

  • Install helper tools on MacOS:

    • Xcode Command Line Tools
    xcode-select --install
    • cmake >= 3.17.3
    brew install cmake
    • Apple clang
    $ clang -v
Apple clang version 12.0.0 (clang-1200.0.32.2)
Target: x86_64-apple-darwin19.6.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

  • Install helper tools on Ubuntu:

    sudo apt-get update
sudo apt-get install g++ cmake

  • Clone repo

    git clone git@github.com:microsoft/SEAL.git

  • Compile the library including examples (on either MacOS or Ubuntu):

    cd SEAL/
cmake . -DSEAL_BUILD_EXAMPLES=ON

  • Compile

    make -j # on MacOS

    or

    make  # on Ubuntu (otherwise it hangs on my machine)

  • Then install the library system wide (requires root access).

    sudo make install

The sealexamples executable is located in native/bin/.

Example

  • Write your first program with SEAL following these instructions.
  • Create a test repo and a file called sealdemo.cpp. 
    mkdir SEALdemo
vi sealdemo.cpp
    with the following content: 
    #include "seal/seal.h"
#include <iostream>

using namespace std;
using namespace seal;

int main()
{
        EncryptionParameters parms(scheme_type::BFV);
        return 0;

}
  • Create a cmake file CMakeLists.txt. 
    cmake_minimum_required(VERSION 3.12)
cmake_minimum_required(VERSION 3.10)
project(SEALDemo VERSION 1.0)
add_executable(sealdemo sealdemo.cpp)

find_package(SEAL)
target_link_libraries(sealdemo SEAL::seal)
  • Compile and run. 
    cmake .
make
./sealdemo
    Obviously there's no output. But it's a first minimal program using the SEAL library.

Author

Responsible for the content of the page is Christiane Peters.