Anonymous proxy re‐encryption

Prototype implementation of two schemes described in the Anonymous proxy re-encryption paper, avaiable here.

The schemes implemented are:

• The modified ElGamal encryption described in section 3.2, called lib-elgamal-mod in the sources
• Anonymous proxy re-encryption described in section 4.1, called lib-anon-proxy in the sources

Requirements

Libraries:

• GMP
• Nettle

Tools:

• gcc / clang
• make
• CMake

Directory Structure

The project is structured as follows:

.
├── bin # contains the executables
├── docs # contains the paper
├── examples # contains two examples of usage
├── libs-mdr # contains utility libraries made by professor Mario Di Raimondo
├── src # contains the source files
└── test # contains the test/bench files

Building

Move to the root directory and type:

make

You can change some params in the CMakeLists.txt file and rebuild the Makefile typing:

cmake .

Usage

After building, you will find all the executables in the bin folder. You can see the examples in the examples/ folder to learn how to use the libraries.

Testing and benchmarking

Testing and benchmarking is avaiable with test-elgamal-mod and test-anon-proxy binaries.

Usage of test-elgamal-mod:

./test-elgamal-mod [verbose|quiet] [lambda 80|112|128] [seed <n>] [message <n>] [use-pp] [bench]

Usage of test-anon-proxy:

./test-anon-proxy [verbose|quiet] [all|original|proxy] [lambda 80|112|128] [seed <n>] [message <n>] [g-pp] [pk-pp] [bench]

References

• Anonymous proxy re-encryption
• GMP
• Nettle
• Mario di Raimondo
• Crypto Engineering
• README.md and directory structure of this project