SACfe: Secure Access Control in Functional Encryption with Unbounded Data

This repository conatins the code for the schemes UZP-IPFE and UAB-IPFE.

Steps to reproduce the experiments.

1. Install dependencies of CiFEr
2. Build our modified CiFEr library
3. Compile and run an example

Install dependencies of CiFEr

The requirements have to be installed manually (via package manager or building the source code).

• CMake (version 3.11+)
• GMP
• libsodium
• AMCL
• Protobuf

To be able to build CiFEr as described below, AMCL must be compiled with BN254 curve. This can be done manually, but for convenience, we provide a Bash script that runs a modified AMCL setup (a Python script) and installs a minimal version of AMCL in the standard directory /usr/local/lib and header files in /usr/local/include. These default values can be changed in external/amcl/setup_amcl.sh. To use the script, run:

cd external/amcl
sudo ./setup_amcl.sh
cd ../..

Build our modified CiFEr library

To build and install, first clone the repo, then run the following commands in the source code directory:

mkdir build
cd build
cmake ..
make
sudo make install

This builds the shared library (libcifer.so) and installs it. By default, it places the shared library in /usr/local/lib and the header files in /usr/local/include

Compile an example

To compile and run an example go to the example folder and run make. There is an example for each proposed scheme e.g. uzpipfe / uabipfe :

cd example
make uzpipfe
./uzpipfe.out